# Iwanai Marine Beach, Japan: what it is and when to go

> Iwanai Marine Beach is a natural site (いわないマリンビーチ) in Japan. Interests: Beaches. The best time to visit is April to October. In June there are 15 h 09 of daylight, and in December, 8 h 50. Here is what it is, where it lies, when to come, how to get there and what else is nearby to turn it into a trip.

- Address: https://kokai.app/en/paises/asia/japon/iwanai-marine-beach/
- Reviewed on: 2026-10-02
- Language: en

## In a nutshell

- **What it is:** Natural site · Beaches
- **Local name:** いわないマリンビーチ
- **Where:** Japan
- **You can go:** April to October.
- **Nearest airport:** CTS Sapporo, 98 km as the crow flies
- **Price:** Gratis
- **Coordinates:** 42.99955, 140.52373

## What it is and where

Iwanai Marine Beach is a natural site (いわないマリンビーチ) in Japan.

Its coordinates are 42.99955, 140.52373; the nearest main airport is New Chitose Airport (CTS, Sapporo), 98 km as the crow flies. How to get around Japan (train, car, bus) is covered in [its country guide](https://kokai.app/en/paises/asia/japon/#moverse).

- [Where it is](https://www.google.com/maps/search/?api=1&query=42.999552%2C140.523731)
- [Directions](https://www.google.com/maps/dir/?api=1&destination=42.999552%2C140.523731)

It is one of the [Beaches](https://kokai.app/en/paises/asia/japon/playa/) places in Japan. In [Kokai](https://kokai.app/en/) it is already on your trip map next to the places you save yourself, and it goes into a day's plan with one tap.

## When to go

Months when you can visit Iwanai Marine Beach: **April to October**.

| Mes | Época | Hours of daylight |
| --- | --- | --- |
| January | Better not | 9 h 10 |
| February | Better not | 10 h 18 |
| March | Better not | 11 h 39 |
| April | Possible | 13 h 11 |
| May | Possible | 14 h 28 |
| June | Possible | 15 h 09 |
| July | Possible | 14 h 52 |
| August | Possible | 13 h 46 |
| September | Possible | 12 h 17 |
| October | Possible | 10 h 47 |
| November | Better not | 9 h 29 |
| December | Better not | 8 h 50 |

In June there are 15 h 09 of daylight, and in December, 8 h 50. Daylight hours are calculated from the site's latitude for the 15th of each month; when planning a full day on foot they matter as much as the weather.

When to go to Japan in general, with its festivals and peak seasons, is in [its country guide](https://kokai.app/en/paises/asia/japon/#cuando-ir).

## Before you go to Japan

To enter Japan there are 10 things to sort out before you leave, starting with “A valid passport covering your whole stay”: they are all, with their deadlines, in [the Japan checklist](https://kokai.app/en/paises/asia/japon/#antes-de-salir). Currency: Japanese yen (JPY); plugs: Type A and B · 100 V · 50/60 Hz (you need an adapter); emergencies: 110 police · 119 ambulance and fire.

In [Kokai](https://kokai.app/en/) you tick off the checklist inside your trip, and each item reminds you when it is time to do it.

## What is nearby

- [原子力PRセンターとまりん館](https://kokai.app/en/paises/asia/japon/pr/): Museum · 3.7 km
- [Iwanai Resort](https://kokai.app/en/paises/asia/japon/iwanai-resort/): Ski resort · 6.8 km
- [Mount Mekunnai](https://kokai.app/en/paises/asia/japon/mt-mekunnai/): Mountain in Hokkaido, Japan · 11 km
- [Mount Raiden](https://kokai.app/en/paises/asia/japon/mt-raiden/): Mountain in Hokkaido, Japan · 12 km
- [Niseko Niimi Onsen](https://kokai.app/en/paises/asia/japon/niimi-onsen/): Building in Rankoshi, Hokkaido Prefecture, Japan · 13 km

Distances are as the crow flies. Everything else is in [the Japan guide](https://kokai.app/en/paises/asia/japon/).

## More in Japan: Beaches

- [Amanohashidate](https://kokai.app/en/paises/asia/japon/amanohashidate/): one of Japan's three scenic views
- [Shichirigahama](https://kokai.app/en/paises/asia/japon/shichirigahama/): sandy beach in Kamakura, Kanagawa prefecture, Japan
- [Yuigahama](https://kokai.app/en/paises/asia/japon/yuigahama-beach/): beach and neighborhood in Kamakura, Kanagawa prefecture, Japan
- [Jōdogahama](https://kokai.app/en/paises/asia/japon/jodogahama/): Part of the Rikuchū Kaigan National Park, in Miyako, Iwate Prefecture, Japan
- [Nakatajima Sand Dunes](https://kokai.app/en/paises/asia/japon/nakatajima-dunes/): Tourist Attraction
- [Kotohiki Beach](https://kokai.app/en/paises/asia/japon/kotohiki-beach/): beach located in Kyotango, Japan

Every Japan place under Beaches, each with its season, is on [its page](https://kokai.app/en/paises/asia/japon/playa/).

## Frequently asked questions

### What is Iwanai Marine Beach?

It is a natural site (いわないマリンビーチ in the local language) in Japan.

### When is the best time to visit Iwanai Marine Beach?

April to October. In June there are 15 h 09 of daylight, and in December, 8 h 50.

### How do you get to Iwanai Marine Beach?

The nearest main airport is New Chitose Airport (CTS), 98 km as the crow flies. From there, [directions](https://www.google.com/maps/dir/?api=1&destination=42.999552%2C140.523731) opens the route on the map, and how to get around Japan is explained in [its country guide](https://kokai.app/en/paises/asia/japon/#moverse).

### How do I add it to my trip?

With one tap. In Kokai it is already on the Japan map, next to the places you save yourself: add it to a day's plan, give it a time and, if you like, get a reminder when you pass nearby.

### What else is around here?

Nearby you have [原子力PRセンターとまりん館](https://kokai.app/en/paises/asia/japon/pr/), [Iwanai Resort](https://kokai.app/en/paises/asia/japon/iwanai-resort/), [Mount Mekunnai](https://kokai.app/en/paises/asia/japon/mt-mekunnai/). The rest is in [the Japan guide](https://kokai.app/en/paises/asia/japon/).

Data from [OpenStreetMap](https://www.openstreetmap.org/node/12517821730), licensed under the ODbL. Daylight hours are calculated from the latitude. More in [credits](https://kokai.app/en/aviso/#creditos).