Izu Oshima



Izu Ōshima (伊豆大島) is in Japan. It is the largest of the seven Izu Islands. Ōshima is famous for Mt. Mihara, an active volcano that last erupted in 1986.

Understand
The whole island is administered as a municipality, Ōshima Town (大島町).

Tourist information site
The local tourist association has a Japanese-only guide site.

Cities
Okata (岡田) is one of the main ports on the island for the ferries and jetfoils from Tokyo, Atami, and Niijima.

Motomachi (元町) is the main town on the island. The post office is next to the ferry port and their international ATM is open 7 days a week from 09:00 to 18:00 on weekdays, and 09:00 to 14:00 on weekends.

Habuminato (波浮港) is a rustic fishing village on the south side of the island. Its historic Row of Houses and amazing views attract many visitors.

Get in
Tokai Kisen (東海汽船) operates a number of high speed boats called "jetfoils" which leave from Takeshiba Sanbashi Pier, near Hamamatsucho, Tokyo. Some of these ferries make a stop in Kurihama, which can be easily reached by direct train from Yokohama on the Keihin-Kyuko line. The trip takes 1 hour and 45 minutes from Tokyo and 1 hour from Kurihama. Jetfoils also leave from Atami in Shizuoka and take you there in 45 minutes. A one-way ticket costs approximately ¥5,700.

Alternatively, one may take the overnight ferry operated by Tokai Kisen for approximately ¥3,500. These do not operate every night, however, so please check the schedule to ensure passage. The ship takes approximately 8 hours during the winter, and 6 during the summer.

All of the ships arrive in either Okata port or Motomachi port, depending on the weather and ocean conditions.

ANA flies from Haneda airport to Oshima in 35 minutes and the airport is close to Motomachi.

Get around
Oshima Bus operates between the main ferry ports in Okata and Motomachi and connect to the arrival and departure of the fast ferries. Upon arrival of the ferry, a bus departs for Mt. Mihara, which also stops at the Oshima Onsen hotel.

A taxi ride between Okata and Motomachi costs approximately ¥2,400 and takes about 15 minutes. i Taxi (+81 4992-2-0306) has a nine-seated taxi, which costs ¥3,000 between Okata and Motomachi and costs ¥5,100 between Okata and Mt. Mihara.

While expensive, renting a car for a couple hours or a day is the best way to see the island. Brush up on your Japanese.

Do

 * Mt. Mihara's Volcano(三原山) can be reached by several hiking trails. Buses from the ferry ports depart for the Gojinka Skyline on the hour.  From Gojinka Skyline, it is a 40-minute walk to the caldera. Intermediate stops include the Oshima Onsen Hotel which leads through the lava field to the crater in an hour and a half.
 * The Sunset Palm Line(サンセットパルムライン) cycling path northward from Motomachi along the coastline provides excellent views of Shizuoka and Mt. Fuji on clear days. Bike rental for 1 day is approximately ¥2,000.
 * Scuba diving
 * Fishing
 * There are several beaches on Oshima, all sporting black sand due to the basaltic origin of the island. If you are staying in Motomachi, the closest beach is Kobohama(弘法浜) near the port.

Since this island is volcanic, it also boasts many onsen (温泉), which are public spas. Next to Motomachi is an office where you can purchase onsen tickets at half of the mentioned price.
 * Hama-no-yu (浜の湯), Motomachi. A co-ed outdoor bath that has great views of Izu Hanto and Mt. Fuji on a clear day. Gets somewhat crowded around sunset and bathing suits are obligatory. The garden in front of the onsen contains a statue of Godzilla, who was entombed in the volcano in one of his movies (and later resurrected in a sequel when the volcano erupted). Entrance fee is ¥400 and it closes at 7PM.  If there is high wind/rain, there is a good chance that the spa will be closed, which will be announced over the island's loudspeakers.
 * Gojinka Spa, Motomachi. Located across the park from Hamanoyu, Gojinka Spa is a very modern facility with hot, warm, and cold baths, a steam room, a sauna, a swimming pool, waterfall therapy, and jacuzzi.  It also has massage chairs and a restaurant in the lobby.  Entrance fee is ¥1,000 at the door, so buy your ticket at the office next to the port for ¥500.  Gojinka Spa closes at 21:00.

Eat
Ashitaba (明日葉) is an indigenous plant to the Izu islands and is used in many local dishes, from salads to tempura, and from soba to tea. Since it contains many vitamins and minerals, it is claimed to have many health-related benefits. The name literally means tomorrow's leaf as it grows very fast.

Drink
Gojinka (御神火): Gojinka is Izu Oshima's brand of "shochu", or home-brewed whiskey. It is completely organic, and brewed by a local family.

Stay safe
Hikers on some trails through dense forest could be confronted with poisonous snakes (蛇 hebi). If the volcano begins erupting while you are close to the summit, there are many "volcano shelters" that one can take refuge in while waiting for help. These look like concrete tubes with an opening on one end, and are found throughout the island. Oshima has an excellent disaster response system, so if you hear sirens, speak to someone to find out what to do.

The epicenter for the Great Tokai Earthquake, which is overdue, is directly under Izu Oshima as well. Please observe proper earthquake precaution techniques.

Go next
Ferries to Hamamatsucho Port leave daily from either Motomachi Port or Okata Port. Please be aware that the port at which you arrived may not be the same port from which you will depart. Ask any shopkeeper on the island which port is scheduled to receive ships that day. During some times of the year (especially in April), there may not be any ferries, restricting travel to and from the island to airplanes and jetfoils.