# Mariana Trench National Wildlife Refuge, Japan: what it is and when to go > Mariana Trench National Wildlife Refuge is a protected area in Japan. Interests: Nature and Wildlife. The best time to visit is April to May and October. In June there are 13 h 02 of daylight, and in December, 10 h 58. 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/mariana-trench-national-wildlife-refuge/ - Reviewed on: 2026-10-02 - Language: en ## In a nutshell - **What it is:** Protected area · Nature, Wildlife - **Where:** Japan - **Best time:** April to May and October. - **Nearest airport:** OKA Naha, 2,090 km as the crow flies - **Website:** [fws.gov](https://www.fws.gov/refuge/mariana-trench) - **Coordinates:** 17.42571, 145.5231 ## What it is and where Mariana Trench National Wildlife Refuge is a protected area in Japan. Its coordinates are 17.42571, 145.5231; the nearest main airport is Naha International Airport (OKA, Naha), 2,090 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=17.425708%2C145.523095) - [Directions](https://www.google.com/maps/dir/?api=1&destination=17.425708%2C145.523095) It is one of the [Nature](https://kokai.app/en/paises/asia/japon/naturaleza/) and [Wildlife](https://kokai.app/en/paises/asia/japon/fauna/) 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 Mariana Trench National Wildlife Refuge is **April to May and October**. | Mes | Época | Hours of daylight | | --- | --- | --- | | January | Possible | 11 h 04 | | February | Possible | 11 h 26 | | March | Possible | 11 h 53 | | April | Best time | 12 h 24 | | May | Best time | 12 h 49 | | June | Possible | 13 h 02 | | July | Possible | 12 h 57 | | August | Possible | 12 h 35 | | September | Possible | 12 h 06 | | October | Best time | 11 h 36 | | November | Possible | 11 h 10 | | December | Possible | 10 h 58 | In June there are 13 h 02 of daylight, and in December, 10 h 58. 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 | | Wildlife | April to May and October | November to March and June to September | It is not the same trip whatever you come for: Mariana Trench National Wildlife Refuge 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 - [South Iwo Jima HP](https://kokai.app/en/paises/asia/japon/south-iwo-jima-hp/): Volcano · 868 km - [South Iwo Jima](https://kokai.app/en/paises/asia/japon/minami-ioto/): Island of the Japanese Volcano Islands chain south of the Ogasawara Islands · 868 km - [Fukutoku-Okanoba](https://kokai.app/en/paises/asia/japon/fukutoku-okanoba/): Mountain in Japan · 871 km - [Okinahama](https://kokai.app/en/paises/asia/japon/okinahama/): Beach · 926 km - [Mount Suribachi](https://kokai.app/en/paises/asia/japon/mt-suribachi/): A 169-metre (554 ft)-high mountain on the southwest end of Iwo Jima · 926 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 Mariana Trench National Wildlife Refuge? It is a protected area in Japan. ### When is the best time to visit Mariana Trench National Wildlife Refuge? April to May and October. In June there are 13 h 02 of daylight, and in December, 10 h 58. ### How do you get to Mariana Trench National Wildlife Refuge? The nearest main airport is Naha International Airport (OKA), 2,090 km as the crow flies. From there, [directions](https://www.google.com/maps/dir/?api=1&destination=17.425708%2C145.523095) 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 [South Iwo Jima HP](https://kokai.app/en/paises/asia/japon/south-iwo-jima-hp/), [South Iwo Jima](https://kokai.app/en/paises/asia/japon/minami-ioto/), [Fukutoku-Okanoba](https://kokai.app/en/paises/asia/japon/fukutoku-okanoba/). The rest is in [the Japan guide](https://kokai.app/en/paises/asia/japon/). Data from [OpenStreetMap](https://www.openstreetmap.org/relation/9173183), licensed under the ODbL, and from [Wikidata](https://www.wikidata.org/), CC0. Daylight hours are calculated from the latitude. More in [credits](https://kokai.app/en/aviso/#creditos).