Haraoka Pier fishing today
- Best time to fish 4:40–5:20 pm average day · 6/10
- Tide now 4.9 ft ↓ falling · low 12:13 pm (3.7 ft)
- Waves · water 2.4 ft · 74 °F slight · 6.1 s from the east-southeast
- Wind · air 4 mph · 59 °F from the NNE, gusts 12 · light drizzle
- Sun 5:58 am–4:50 pm 10 h 51 min of daylight
- Moon 88% · 7:00 pm waning gibbous · rises at 7:00 pm
- Coefficient 93 spring tides · spring tides Oct 27–29
- Major solunar period 1:13–3:13 pm today's activity: medium
Today in Haraoka Pier there are high tides at 7:08 am (5.5 ft) and 5:35 pm (5.6 ft) and low tides at 12:06 am and 12:13 pm. Tide coefficient 93. Right now the tide is falling toward the low tide at 12:13 pm. The sun rises at 5:58 am and sets at 4:50 pm: 10 h 51 min of daylight. The moon is 88% illuminated (waning gibbous) and rises at 7:00 pm. Major solunar periods run from 12:41 am to 2:41 am and from 1:13 pm to 3:13 pm. The next spring tides arrive from October 27 to 29. The sea is slight, with 2.4 ft waves. There's a light breeze from the north-northeast (4 mph). Light drizzle, 59 °F.
Fishing in Haraoka Pier today
Best time to fish
Solunar activity today: medium- High tide at 5:35 pm, coefficient 88
- Sunset at 4:50 pm, golden hour from 4:15 pm
- Rising pressure (+0.16 inHg in 24 h), almost no wind and some swell (2.5 ft waves) to stir the water
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 93 (spring tides)
Your day at a glance
The best window, 4:40 pm to 5:20 pm, combines the 5:35 pm high tide, sunset and some swell, though with rising pressure. Also worth a try from 6:10 am to 8:10 am, with the 7:08 am high tide, sunrise and some swell, though with rising pressure.
Species with the most records nearby: striped mullet, Japanese amberjack, mahi-mahi and John Dory. October is one of the months when these are seen most: blackhead seabream. What you can catch
About Haraoka PierThe pier
4.7 mi from Tateyama. Tides, weather and sun in Tateyama →
Data from OpenStreetMap and Wikidata: some may be missing or out of date. Check the rules and hours on site. Wikipedia (in Japanese) · See on OpenStreetMap · Fix on OpenStreetMap
Beach day in Haraoka Pier
Is it a beach day?
- Offshore breeze (5 mph)
- Calm for swimming: 2.4 ft waves
- Water at 74 °F (nice)
- Low tide at 12:13 pm: more sand
- Cloudy (93% cloud cover)
- Feels like 65 °F: a bit cool
Today, hour by hour
- Swimming Calm · 2.4 ft
2.4 ft waves: calm for swimming. Low rip current risk. Always follow the lifeguard's flags.
- Water 74 °F
Nice for swimming.
- Sun & sunscreen UV 3 · SPF 15
Max UV 3 (low): SPF 15 sunscreen.
- Wind 5 mph
Offshore breeze (5 mph).
- Tide & sand 12:13 pm
Low tide at 12:06 am and 12:13 pm: that's when there's the most sand. High tide at 7:08 am and 5:35 pm. Coefficient 93 (spring tides): little sand left at high tide.
We don't have data on jellyfish, sargassum or beach closures: ask the lifeguard or check with the local beach authority. How it works · The next 7 days
Beaches near Haraoka Pier
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- 北条海水浴場 3.4 mi · SE
- Restrooms
- Parking
- 岩井海水浴場 3.5 mi · N
- 沖ノ島海水浴場 3.8 mi · S
- Restrooms
- 大賀海岸 4.4 mi · S
- Parking
- 大六海水浴場 5.3 mi · N
- Restrooms
- Showers
- Parking
- 波左間海水浴場 5.5 mi · SW
- Restrooms
- Parking
Named beaches within 6.2 mi, nearest first. Amenities from OpenStreetMap: some may be missing or out of date. View on OpenStreetMap · Add or fix on OpenStreetMap
Beaches and amenities: © OpenStreetMap contributors (ODbL).
Webcams near Haraoka Pier
Webcams provided by windy.com — add a webcam
Tides in Haraoka Pier
Today's high and low tides
- ▼ Low tide 12:06 am 0.3 ft
- ▲ High tide 7:08 am 5.5 ft · coef. 93
- ▼ Next low tide 12:13 pm 3.7 ft
- ▲ High tide 5:35 pm 5.6 ft · coef. 88
↓ Falling The tide is falling. 3 h 7 min to low tide at 12:13 pm.
Tide coefficient 93 for the 7:08 am high tide and 88 for the 5:35 pm high tide. Spring tides. The water rises and falls 5.3 ft between the highest high and the lowest low: a large range for this place. 70 is an average tide here; 90 and above means spring tides; below 45, neap tides. What is the tide coefficient?
2026 extremes: the highest tide of the year is on September 29 (5.7 ft) and the lowest, on May 18 (-0.5 ft).
Mixed: two high and two low tides a day, but of quite different heights.
Heights above chart datum (CD), the zero of that port's nautical charts. Astronomical prediction: wind and air pressure can raise or lower the water by a few inches, and more in a storm. Not for navigation. chart datum (CD)
Tide coefficient and range in October
The biggest tides of the month came from October 26 to 27 (coefficient 104, 5.3 ft range). The smallest, on October 19 (coefficient 23, 2.1 ft).
Tide and solunar table · this week
| Day | Sun | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Coef. | Moon | Major periods | Activity |
|---|---|---|---|---|---|---|---|---|---|
| Today, Thu 29 | 5:58 am · 4:50 pm | Low tide 12:06 am · 0.3 ft | High tide 7:08 am · 5.5 ft | Low tide 12:13 pm · 3.7 ft | High tide 5:35 pm · 5.6 ft | Coef. 93 | 88% | Major periods 12:41 am · 1:13 pm | Medium |
| Fri 30 | 5:59 am · 4:49 pm | Low tide 12:45 am · 0.4 ft | High tide 7:59 am · 5.4 ft | Low tide 12:50 pm · 4.0 ft | High tide 6:04 pm · 5.4 ft | Coef. 80 | 80% | Major periods 1:46 am · 2:18 pm | Medium |
| Sat 31 | 6:00 am · 4:48 pm | Low tide 1:28 am · 0.7 ft | High tide 8:57 am · 5.1 ft | Low tide 1:34 pm · 4.2 ft | High tide 6:38 pm · 5.1 ft | Coef. 65 | 69% | Major periods 2:50 am · 3:20 pm | Medium |
| Sun 1 | 6:01 am · 4:47 pm | Low tide 2:20 am · 1.2 ft | High tide 10:12 am · 4.8 ft | Low tide 2:44 pm · 4.3 ft | High tide 7:30 pm · 4.8 ft | Coef. 48 | 58% | Major periods 3:50 am · 4:19 pm | Medium |
| Mon 2 | 6:02 am · 4:46 pm | Low tide 3:30 am · 1.7 ft | High tide 11:48 am · 4.7 ft | Low tide 5:33 pm · 4.1 ft | High tide 9:10 pm · 4.4 ft | Coef. 37 | Last quarter | Major periods 4:46 am · 5:12 pm | Medium |
| Tue 3 | 6:03 am · 4:45 pm | Low tide 5:05 am · 2.0 ft | High tide 1:00 pm · 4.7 ft | Low tide 7:05 pm · 3.6 ft | High tide 11:36 pm · 4.2 ft | Coef. 43 | 36% | Major periods 5:37 am · 6:01 pm | Medium |
| Wed 4 | 6:04 am · 4:44 pm | Low tide 6:35 am · 2.0 ft | High tide 1:44 pm · 4.8 ft | Low tide 7:54 pm · 3.0 ft | — | Coef. 50 | 26% | Major periods 6:24 am · 6:47 pm | Medium |
▲ high tide · ▼ low tide · heights above chart datum (CD). Major periods: start time; they last 2 hours. Activity: based on the moon phase and the solunar periods.
Where this tide comes from
Tides from the Tateyama station (JMA), 4.3 mi from Haraoka Pier. Times and heights are its predictions.
Station data attribution: Source: Japan Meteorological Agency website (出典：気象庁ホームページ), tide table (潮位表) for Tateyama (館山), https://www.data.jma.go.jp/kaiyou/db/tide/suisan/suisan.php?stn=TT. Public Data License (Version 1.0) (https://www.digital.go.jp/resources/open_data/public_data_license_v1.0), compatible with CC BY 4.0. Modified by TidePlanet (気象庁「潮位表」を加工して作成): harmonic constants fitted from the hourly prediction of 2025–2026; not an official JMA product.
The sea at Haraoka Pier
Sea stateSea state: slight
The waves you may find
- Most commonMost common1.2 ft
- Significant2.4 ft
- Highest expectedHighest4.9 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 4.9 ft. Before heading out, expect waves of up to 4.9 ft.
Wind on the coast and offshore
Cross-offshore wind. The coast faces west and the wind comes off the land at an angle: calmer water near the shore, and bait and boats drift out to sea.
Wave height, next 7 daysWaves, next 7 days
Waves build over the next few days. The biggest waves arrive on Monday 2: 6.4 ft with a period of 7 s, from the south-southwest (moderate).
Water temperature
Water temperature →Water temperature changes how fish behave: in very cold or very warm water they feed less. The water is steady these days, with no sudden changes.
Water warmer than normal for late October (+2.3 °F).
Satellite: NASA MUR (JPL MUR MEaSUREs, PO.DAAC), doi:10.5067/GHGMR-4FJ04. Sources and licenses
Water temperature →Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 9:06 am (local time).
Surf in Haraoka Pier today
Surf today
Flat- Barely any waves (0.8 ft sets): flat
- Almost no wind (4 mph): glassy water
- Falling tide (low tide at 12:13 pm)
It’s flat today: almost no waves reach this coast.
- Light: First light 5:32 am · sunrise 5:58 am · sunset 4:50 pm · last light 5:16 pm
- Tide: low 12:06 am (0.3 ft), high 7:08 am (5.5 ft), low 12:13 pm (3.7 ft) and high 5:35 pm (5.6 ft). Every break has its own tide: some work at low tide and others at high tide. The tide doesn’t change the score here.
- Water at 73.8 °F: a rash guard or a neoprene top.
- Energy: 18 kJ · Low power
Today’s surf at a glance
The best window, 9:00 am to 1:00 pm, has glassy water, though with barely any waves.
An estimate for this stretch of coast, not for a specific break: every beach or reef works its own way (its tide, bottom and angle). Check it when you get there.
Follow the flags and the lifeguards, and don’t paddle out if the surf is above your level: this score is a guide, not a substitute for what you see when you get there.
Diving in Haraoka Pier today
Diving and snorkeling today
Likely visibility: good- Slack water around low tide (12:13 pm): little current from 11:40 am to 12:50 pm
- 1.7 ft swell at 4 s from the southeast: some surge on the bottom
- Light offshore wind (5 mph)
- 0.2 mph current toward the south, weak (model)
- Sun high: more light underwater
- Slack water today: low tide 12:06 am (11:50 pm–12:21 am), high tide 7:08 am (6:50–7:30 am), low tide 12:13 pm (11:40 am–12:50 pm) and high tide 5:35 pm (5:10–6:00 pm)
- Likely visibility: good. Swell (up to 3.3 ft at 6 s) over the last few days has stirred up the water. Based on the last 24 hours of data.
- Water at 73.8 °F: a 3 mm wetsuit.
- Snorkeling: doable, with some waves or wind.
- Night dive: dark from 5:16 pm. Waning gibbous (88%), rising at 7:00 pm: a bright night.
Your diving day at a glance
The best window, 10:30 am to 1:20 pm, combines slack water at low tide, light wind, weak current and the sun high.
Slack water comes from the tide: in inlets, channels and between islands the water can keep running for an hour or two after. Ask the local dive shop.
Never dive alone and check with the local dive shop: this rating is a guide, not a substitute for a professional.
Dive sites, wrecks and dive shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- 千葉県館山市の沖ノ島ダイビングサービスマリンスノー 4.1 mi
- 香（こうやつ）ダイビングサービス 4.5 mi
- Scoop Dive Activity 4.5 mi
- かっちゃまダイビングサービス 4.7 mi
- マナティーズ 4.7 mi
- オーシャン館山 5.0 mi
- Sara 5.3 mi
- Hasama Marine Park 5.5 mi
- シークロップダイビングスクール 5.9 mi
- ｜ ・ Padi 7.0 mi
- Bommie 7.0 mi
Within 12 mi. Some may be missing or closed; marine reserves usually need a permit. Open the map on OpenStreetMap · Missing one? Add it to OpenStreetMap
Sites: © OpenStreetMap contributors (ODbL).
Weather in Haraoka Pier
Now in Haraoka Pier
- Low / high
- 48 / 64 °F
- Rain
- 0.04 in · 76%
- Clouds
- 100%
- Humidity
- 67%
- Dew pointDew point
- 48 °F
- Visibility
- 15 mi
- UV indexUV
- 1 · low
- Air qualityAir
- Fair · 30
- Saharan dust
- No
Pressure and fishing
- ↗ RisingRising Anglers say fish bite less for a while
- → SteadySteady · now Anglers expect normal activity
- ↘ FallingFalling Anglers say fish feed more before the change
Steady now (+0.02 inHg in 3 hours). Over the next 48 hours: −0.48 inHg. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.
Today, hour by hourHour by hour
Bars: mean wind. Dashed line: gusts. Arrows point where the wind blows to.
| Time | 12:00 am | 3:00 am | 6:00 am | 9:00 am | 12:00 pm | 3:00 pm | 6:00 pm | 9:00 pm |
|---|---|---|---|---|---|---|---|---|
| Sky | Partly cloudy | Clear | Overcast | Overcast | Light drizzle | Light drizzle | Mainly clear | Light drizzle |
| Temperature | 53° | 48° | 50° | 59° | 62° | 64° | 57° | 57° |
| Wind (mph) | 6 ENE | 6 NE | 7 ENE | 4 NNE | 5 ENE | 3 E | 2 E | 6 SSE |
| Gusts | 11 | 12 | 14 | 12 | 14 | 12 | 3 | 13 |
| Waves | 2.6 ft | 2.2 ft | 2.2 ft | 2.4 ft | 2.4 ft | 2.4 ft | 2.6 ft | 2.6 ft |
| Rain | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in |
- 9:00 am 59° 4 NNE 2.4 ft
- 12:00 pm 62° 5 ENE 2.4 ft
- 3:00 pm 64° 3 E 2.4 ft
- 6:00 pm 57° 2 E 2.6 ft
- 9:00 pm 57° 6 SSE 2.6 ft
- 12:00 am 58° 3 N 2.7 ft
- 3:00 am 57° 2 N 3.1 ft
- 6:00 am 58° 3 SE 3.8 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 29 | 48 / 64 °F | 7 mph ENE | 2.7 ft | 7:08 am · 5:35 pm | |
| Fri 30 | 57 / 73 °F | 11 mph SW | 6.0 ft | 7:59 am · 6:04 pm | |
| Sat 31 | 56 / 73 °F | 12 mph NW | 6.0 ft | 8:57 am · 6:38 pm | |
| Sun 1 | 50 / 66 °F | 6 mph ENE | 5.1 ft | 10:12 am · 7:30 pm | |
| Mon 2 | 55 / 67 °F | 16 mph SW | 6.4 ft | 11:48 am · 9:10 pm | |
| Tue 3 | 53 / 72 °F | 8 mph NE | 6.2 ft | 1:00 pm · 11:36 pm | |
| Wed 4 | 55 / 59 °F | 10 mph NNE | 4.6 ft | 1:44 pm | |
| Thu 5 | 55 / 62 °F | 12 mph N | 6.2 ft | 1:19 am · 2:16 pm | |
| Fri 6 | 54 / 69 °F | 9 mph NNE | 6.4 ft | 2:28 am · 2:44 pm | |
| Sat 7 | 52 / 60 °F | 9 mph NE | 5.9 ft | 3:26 am · 3:08 pm | |
| Sun 8 | 48 / 57 °F | 6 mph NNE | 3.3 ft | 4:18 am · 3:31 pm | |
| Mon 9 | 47 / 56 °F | 11 mph NE | 3.9 ft | 5:08 am · 3:53 pm | |
| Tue 10 | 45 / 61 °F | 6 mph NNE | 3.5 ft | 5:53 am · 4:15 pm | |
| Wed 11 | 45 / 61 °F | 6 mph NE | 3.3 ft | 6:34 am · 4:39 pm |
- Fri 30 Light rain 57° / 73° 6.0 ft
- Sat 31 Partly cloudy 56° / 73° 6.0 ft
- Sun 1 Overcast 50° / 66° 5.1 ft
- Mon 2 Light rain 55° / 67° 6.4 ft
- Tue 3 Drizzle 53° / 72° 6.2 ft
- Wed 4 Light drizzle 55° / 59° 4.6 ft
- Thu 5 Light drizzle 55° / 62° 6.2 ft
Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.
- The models They don't agree · low confidence: unsure about rain tomorrow. See the models →
- Outlook Next few weeks, compared with normal: a bit warmer, normal rain and a warmer sea. See the outlook →
- Normal Today, cooler than normal for late October (−3.4 °F; normal high: 68 °F). Climate by month →
Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 9:06 am (local time).
The sun in Haraoka Pier
Sunrise and sunset
- First light 5:03 am
- Full dark 5:46 pm
- Civil dawn 5:32 am
- Civil dusk 5:16 pm
- Solar noon 11:24 am (42° high)
- Daylight 10 h 51 min (−2 min)
- Evening golden hour 4:15 pm
- Full dark 5:46 pm
Golden hour and the day-night map
Today the sun is 92,344,959 mi away and looks 32′ 11″ across.
The moon in Haraoka Pier
Moon phase and position
Today the moon is 226,480 mi away and looks 32′ 46″ across.
Solunar periods
Today's activity: medium- 12:41–2:41 am Major · the moon passes overhead · high activity
- 1:13–3:13 pm Major · the moon passes underfoot · high activity
- 8:55–9:55 am Minor · moonset · medium activity
- 6:30–7:30 pm Minor · moonrise · medium activity
According to solunar theory, fish feed more when the moon passes overhead or underfoot (major periods, about 2 h) and when it rises or sets (minor periods, 1 h). It works best around new and full moon.
Upcoming moon phases
2026 moon calendar →- Last quarter Mon, Nov 2 · 5:29 amNov 2 in 4 days
- New moon Mon, Nov 9 · 4:03 pmNov 9 in 11 days
- First quarter Tue, Nov 17 · 8:48 pmNov 17 in 19 days
- Full moon Tue, Nov 24 · 11:54 pmNov 24 in 26 days
Perigee on October 29, 226,426 mi away, coinciding with the spring tides from October 27 to 29: they will be stronger than usual.
Where to fish in Haraoka Pier
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Haraoka Pier 0.0 mi
- 北条桟橋 3.7 mi
- Tateyama Sunset Pier 3.8 mi
- Jetty 1.8 mi
- 自衛隊堤防 3.9 mi
- Jetty 4.5 mi
- Jetty 8.9 mi
- 布良漁港 8.6 mi
- マリンスポット釣𠮷 1.3 mi
- 黒河釣具店 8.6 mi
Within 9.3 mi. A spot may be missing or closed. Open the map on OpenStreetMap · Missing one? Add it to OpenStreetMap
Spots: © OpenStreetMap contributors (ODbL) and Overture Maps.
Water depth
Gentle slopeThe bottom slopes gently: 16 ft deep 0.5 mi from shore and 33 ft at 0.85 mi. It reaches 164 ft at 2.2 mi.
From the shoreline out to sea, heading west.
How far from shore
- 16 ft deep0.5 mi
- 33 ft deep0.85 mi
- 66 ft deep1.3 mi
- 164 ft deep2.2 mi
For fishing, swimming and diving
- Shore fishing. Shallow, gradual bottom (16 ft at 0.5 mi): cast far from the beach and fish the high tide, when there is more water close in.
- Swimming. A very gentle way in with plenty of shallow water, good for kids. At low tide the water can be far out.
- Diving. Shallow near shore: you only reach 33 ft at 0.85 mi. For dives deeper than 33 ft, go by boat.
Rough estimate: here the data comes in cells of about 0.3 mi and misses details near shore (rocks, sandbars, small coves).
Source: NOAA ETOPO 2022 (CC0), cells of about 0.3 mi; depth below mean sea level. For reference only: not for navigation or anchoring.
Tides near Haraoka PierTides nearby
- Tateyama4.7 mi
- Minamibōsō5.5 mi
- Motona7.2 mi
- Wada10 mi
- Higashiemi13 mi
- Miura14 mi
- Nagase14 mi
- Kurihama15 mi
- Kamogawa16 mi
- Futtsu18 mi
Haraoka Pier at a glance
- Pier. Coordinates: 35.044° N, 139.831° E.
- It is 42 mi southwest of Chiba, the main place in Chiba. The sun rises at the same time and sets 2 min later than in Chiba.
- 4.7 mi from Tateyama.
- The nearest tide station, Tateyama, is 4.3 mi to the south.
- Its coast faces west.
- Beaches and harbors nearby: Tadara Kitahama Kaigan (0.3 mi), Tomiura Old Port (0.3 mi), Toyooka Fishing Port (0.6 mi), Tomiura New Port (0.6 mi).
Questions about Haraoka PierQuestions
Where is Haraoka Pier?
A pier 4.7 mi from Tateyama, in Chiba (Japan). The coast faces west.
Can you fish at Haraoka Pier?
OpenStreetMap doesn't say whether fishing is allowed. Check the rules on site and the local fishing license: they can change.
What time is high tide today in Haraoka Pier?
Today in Haraoka Pier there are high tides at 7:08 am (5.5 ft) and 5:35 pm (5.6 ft) and low tides at 12:06 am and 12:13 pm. Tide coefficient 93.
What time is sunset today in Haraoka Pier?
At 4:50 pm. There is light until the end of civil twilight, at 5:16 pm.
What time is sunrise tomorrow in Haraoka Pier?
At 5:59 am. First light comes at 5:04 am.
What phase is the moon today?
Waning gibbous, 88% illuminated. New moon on Mon, Nov 9 · 4:03 pm.
When are the next spring tides?
From October 27 to 29, together with the lunar perigee: they will be stronger than usual.
What are today's solunar periods?
Major 12:41–2:41 am, Minor 8:55–9:55 am, Major 1:13–3:13 pm, Minor 6:30–7:30 pm. Today's activity is medium.
What's the weather like today in Haraoka Pier?
Light drizzle, from 48 °F to 64 °F, with a light breeze from the north-northeast (4 mph) and a 76% chance of rain.
How is the sea today in Haraoka Pier?
Slight (Douglas 3): 2.4 ft waves with a period of 6.1 s from the east-southeast. The water is 73.8 °F.
When is the best time to visit Haraoka Pier?
The best time to visit Haraoka Pier is from July to August and in May: highs of 71 °F to 85 °F, about 10 rainy days a month and 6 hours of sunshine a day.
Can I use this data for navigation?
No. These are predictions for fishing and leisure; for navigation, use the official publications.
Where this data comes from
Tide: Tateyama point of the Japan Meteorological Agency (JMA) tide tables. 出典：気象庁ホームページ, under the Public Data License 1.0 (compatible with CC BY 4.0); constants fitted by TidePlanet from two years of its hourly predictions (気象庁「潮位表」を加工して作成). Not an official JMA publication. Sun and moon: our own calculation with astronomy-engine. Places: GeoNames (CC BY 4.0). Coastline: © OpenStreetMap contributors (ODbL).