# Mount Ōsa, Japan: what it is and when to go

> Mount Ōsa is a mountain in Kagawa Prefecture, Japan (大麻山) (Takamatsu), at 616 m above sea level. Interests: Nature and Mountains. The best time to visit is April to May and October. In June there are 14 h 16 of daylight, and in December, 9 h 44. It has articles in 2 Wikipedias, so it is not one of the busiest places in Japan: one to enjoy at a calmer pace. 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/mt-osayama/
- Reviewed on: 2026-10-02
- Language: en

## In a nutshell

- **What it is:** Mountain in Kagawa Prefecture, Japan · Nature, Mountains
- **Local name:** 大麻山
- **Where:** Japan
- **Elevation:** 616 m
- **Best time:** April to May and October.
- **Nearest airport:** KIX Osaka, 136 km as the crow flies
- **Coordinates:** 34.19669, 133.78851

## What it is and where

Mount Ōsa is a mountain in Kagawa Prefecture, Japan (大麻山) (Takamatsu), at 616 m above sea level. It has articles in 2 Wikipedias, so it is not one of the busiest places in Japan: one to enjoy at a calmer pace.

It is in [Takamatsu](https://kokai.app/en/paises/asia/japon/takamatsu/), where this site lists 72 more places to see, 29 km from the centre.

Its coordinates are 34.19669, 133.78851; the nearest main airport is Kansai International Airport (KIX, Osaka), 136 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=34.196694%2C133.788508)
- [Directions](https://www.google.com/maps/dir/?api=1&destination=34.196694%2C133.788508)

It is one of the [Nature](https://kokai.app/en/paises/asia/japon/naturaleza/) and [Mountains](https://kokai.app/en/paises/asia/japon/montana/) 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

The best time to visit Mount Ōsa is **April to May and October**.

| Mes | Época | Hours of daylight |
| --- | --- | --- |
| January | Possible | 9 h 57 |
| February | Possible | 10 h 46 |
| March | Possible | 11 h 45 |
| April | Best time | 12 h 52 |
| May | Best time | 13 h 47 |
| June | Possible | 14 h 16 |
| July | Possible | 14 h 04 |
| August | Possible | 13 h 17 |
| September | Possible | 12 h 12 |
| October | Best time | 11 h 07 |
| November | Possible | 10 h 11 |
| December | Possible | 9 h 44 |

In June there are 14 h 16 of daylight, and in December, 9 h 44. 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.

| What you come for | Best time | Possible |
| --- | --- | --- |
| Nature | April to May and October | November to March and June to September |
| Mountains | April to May and October | November to March and June to September |

It is not the same trip whatever you come for: Mount Ōsa has a different season depending on what you want to do here, and [Kokai](https://kokai.app/en/) puts it in the right month for you.

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

- [Mount Zōzu](https://kokai.app/en/paises/asia/japon/mt-zozu/): Mountain in Japan · 1.4 km
- [Mount Kotohira](https://kokai.app/en/paises/asia/japon/mt-kotohira/): Mountain in Japan · 1.6 km
- [Kotohira-gū](https://kokai.app/en/paises/asia/japon/kotohira-gu/): Shinto shrines in Kagawa Prefecture, Japan · 2.4 km
- [Zentsū-ji](https://kokai.app/en/paises/asia/japon/zentsu-ji/): Shingon temple in Zentsūji, Kagawa Prefecture, Japan, which is Temple 75 on the Shikoku 88 temple pilgrimage · 3.4 km
- [Shikoku Pilgrimage 74th Kōyamaji - 75th Zentsūji](https://kokai.app/en/paises/asia/japon/shikoku-pilgrimage-74th-koyamaji-75th-zentsuji/): Hiking · 4.0 km

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

## More in Japan: Nature

- [Mount Fuji](https://kokai.app/en/paises/asia/japon/monte-fuji/): volcano in Yamanashi and Shizuoka Prefectures, Japan
- [Itsukushima Shrine](https://kokai.app/en/paises/asia/japon/santuario-itsukushima/): Shinto shrine in Hiroshima Prefecture, Japan
- [Tokyo Bay](https://kokai.app/en/paises/asia/japon/bahia-de-tokio/): bay in Japan
- [Mount Asama](https://kokai.app/en/paises/asia/japon/asama/): volcano on the border of Gunma and Nagano prefectures in Japan
- [Sakurajima](https://kokai.app/en/paises/asia/japon/sakurajima/): volcano and island located in Kagoshima prefecture, Japan
- [Mount Aso](https://kokai.app/en/paises/asia/japon/monte-aso/): volcano in Kumamoto Prefecture, Japan

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

## Frequently asked questions

### What is Mount Ōsa?

It is a mountain in Kagawa Prefecture, Japan (大麻山 in the local language). It has articles in 2 Wikipedias, so it is not one of the busiest places in Japan: one to enjoy at a calmer pace.

### When is the best time to visit Mount Ōsa?

April to May and October. In June there are 14 h 16 of daylight, and in December, 9 h 44.

### How do you get to Mount Ōsa?

The nearest main airport is Kansai International Airport (KIX), 136 km as the crow flies. From there, [directions](https://www.google.com/maps/dir/?api=1&destination=34.196694%2C133.788508) 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 [Mount Zōzu](https://kokai.app/en/paises/asia/japon/mt-zozu/), [Mount Kotohira](https://kokai.app/en/paises/asia/japon/mt-kotohira/), [Kotohira-gū](https://kokai.app/en/paises/asia/japon/kotohira-gu/). The rest is in [the Japan guide](https://kokai.app/en/paises/asia/japon/).

Data from [OpenStreetMap](https://www.openstreetmap.org/node/3267226281), licensed under the ODbL, and from [Wikidata](https://www.wikidata.org/wiki/Q11442030), CC0. More about Mount Ōsa on [Wikipedia](https://ja.wikipedia.org/wiki/%E5%A4%A7%E9%BA%BB%E5%B1%B1_(%E9%A6%99%E5%B7%9D%E7%9C%8C%E4%B8%89%E8%B1%8A%E5%B8%82)). Daylight hours are calculated from the latitude. More in [credits](https://kokai.app/en/aviso/#creditos).