Ōkunoshima Guide: Rabbit Island, Its Wartime Past and Japanese to Use

Ōkunoshima is a small island in the Seto Inland Sea where hundreds of free-roaming rabbits hop out to meet each ferry. It is also the site of a secret wartime poison gas factory, whose ruins still stand among the trees. A day here pairs a gentle, happy visit with a sobering history, and the Japanese you need is short, practical and mostly about rabbit food.

What you need to know

Ōkunoshima Guide: Rabbit Island, Its Wartime Past and Japanese to Use

Ōkunoshima, often called Usagi Shima, Rabbit Island, lies about fifteen minutes by ferry off Tadanoumi in Takehara, in eastern Hiroshima Prefecture. Its circumference is only about four kilometres, and it has one hotel, a visitor centre, a small museum and no shops, which is part of what makes it special. Rabbits live everywhere: on the lawns, under the benches and in the shade of old concrete buildings. Those buildings are the other story of the island. From 1929 to 1945 the Imperial Japanese Army manufactured poison gas here in secret, and the power station, gun batteries and storage ruins remain. This guide covers how to reach the island, where to buy rabbit feed before you board, the rules that keep the rabbits healthy, what to see on a walk around the coast, the words on the signs and the Japanese for the ferry and the feed shop, with a short dialogue to practise before you go.

JR Kure Line to Tadanoumi, then a short walk to the port and about fifteen minutes by ferry

Buy rabbit feed before you board; none is sold on the island

Esa means animal feed; ask usagi no esa wa arimasu ka at the port shop

Never pick up or chase the rabbits, and take any uneaten food away with you

Why Rabbit Island is more than rabbits

Ōkunoshima's fame is easy to explain: step off the ferry and rabbits come running. There are several hundred of them, of many colours, living wild across the island. No one is entirely sure how the population began; the most common story traces it to a handful of rabbits released on the island around the 1970s. With no foxes or dogs and a steady supply of visitors, they have thrived.

The island's older history is darker. Ōkunoshima was fortified with gun batteries in the Meiji era, and from 1929 the army turned it into a factory for poison gas. The work was kept secret, and many workers suffered lasting harm to their health. After the war the stocks were disposed of, and the island later became a national resort with a hotel and walking paths. The ruins were left in place.

For a visitor the two sides sit side by side: a rabbit dozing in the doorway of a ruined power station. For a Japanese learner the island is a pleasant, low-pressure place to practise: short signs, friendly staff and simple questions about food, ferries and time.

Three rabbits, two brown and one grey, eating side by side on gravel on Ōkunoshima
Rabbits eating together on the gravel near the shore.Steffen Flor, CC BY-SA 2.0, via Wikimedia Commons

Getting there: Tadanoumi Station and the ferry

Tadanoumi Station is on the JR Kure Line, which runs along the coast between Mihara and Kure. Most visitors change at Mihara, which has shinkansen and San'yō Line services, and take a local train from there. From Tadanoumi Station, walk about five minutes towards the sea to Tadanoumi port, 忠海港. The ferry ticket office and a shop selling rabbit food are at the port.

The ferry crossing takes about fifteen minutes. On the island, the pier is at one end of the flat coastal road that loops right round. The hotel, Kyūkamura Ōkunoshima, is a walk along the coast from the pier, with the visitor centre and the Poison Gas Museum close by. Check the ferry timetable at the port and note the last sailing back before you set off.

JapaneseRomajiMeaning
忠海港はどちらですか。Tadanoumi-kō wa dochira desu ka.Which way is Tadanoumi port?
大久野島まで往復でお願いします。Ōkunoshima made ōfuku de onegai shimasu.A return ticket to Ōkunoshima, please.
次の船は何時ですか。Tsugi no fune wa nanji desu ka.What time is the next boat?
帰りの最終便は何時ですか。Kaeri no saishūbin wa nanji desu ka.What time is the last boat back?
この近くにスーパーはありますか。Kono chikaku ni sūpā wa arimasu ka.Is there a supermarket near here?

Around the island: rabbits, ruins and the coast path

A walk right round the coastal road takes about an hour at a steady pace, longer with rabbit stops. The road is flat and quiet, with sea views to the islands of the Shimanami area. The hotel rents bicycles if you would rather ride. Rabbits are most active in the morning and late afternoon; in the heat of the day they rest in the shade under trees and buildings.

The concrete shell of a large abandoned power station building on Ōkunoshima with empty window frames, a fenced yard and several rabbits on the ground in front
The ruined power station, with rabbits in the yard in front.Addy Cameron-Huff, CC BY 2.0, via Wikimedia Commons
  • Sanbashi: the ferry pier, where the first welcoming committee of rabbits usually waits.
  • Kyūkamura Ōkunoshima: the island's only hotel, with a restaurant, a café corner, a hot spring bath and bicycle hire.
  • Ōkunoshima Visitor Centre: displays on the island's nature and wildlife, near the hotel.
  • Dokugasu Shiryōkan, the Poison Gas Museum: a small museum on the wartime factory and its victims.
  • Hatsudenjō ato: the ruined power station, a large concrete shell by the road.
  • Hōdai ato: the Meiji-era gun battery ruins, in the woods at the north, centre and south of the island.

Some of the hillside paths to the island's high point have been closed since heavy rain in 2018. Stick to the coastal road and the marked paths, and check at the visitor centre before trying anything steeper.

Words on the signs

Many of the signs on the island end in the kanji 跡, ato, which means remains or site. It marks every ruin: the power station, the batteries and the gas storage buildings. The other common ending is 港, kō, port, as in Tadanoumi-kō. The rules for the rabbits are posted at the pier and around the island, usually with pictures, and it is worth reading them slowly.

Six words you will see on a trip to Ōkunoshima: Tadanoumi-kō, jōsenken, Kyūkamura, Dokugasu Shiryōkan, hatsudenjō ato and hōdai ato, in Japanese with romaji
Six words for the port, the hotel and the ruins around the island.
WordReadingMeaning
忠海港Tadanoumi-kōTadanoumi port, the mainland ferry terminal
乗船券jōsenkenFerry ticket
休暇村KyūkamuraThe national resort hotel chain; the island's hotel
毒ガス資料館Dokugasu ShiryōkanThe Poison Gas Museum
発電場跡hatsudenjō atoRuins of the power station
砲台跡hōdai atoRuins of a gun battery
うさぎusagiRabbit
エサesaAnimal feed
持ち帰りmochikaeriTake home with you

Japanese for buying rabbit feed and following the rules

The most important shopping you will do is on the mainland. The shop at Tadanoumi port sells bags of rabbit pellets, and supermarkets and convenience stores near the station sell cabbage and carrots. There is nowhere on the island to buy feed, and the only place to buy human food is the hotel, so bring water and a snack as well.

On the island, the rules are simple and the staff are happy to explain them. Place food on the ground, not in your hand, away from the road. Stay with it until it is eaten, and take what is left back with you. Rabbits that gather on roads are at risk from the island's few vehicles.

JapaneseRomajiMeaning
うさぎのエサはありますか。Usagi no esa wa arimasu ka.Do you have rabbit feed?
何袋あれば足りますか。Nan-fukuro areba tarimasu ka.How many bags will be enough?
キャベツはうさぎにあげても大丈夫ですか。Kyabetsu wa usagi ni agete mo daijōbu desu ka.Is it all right to give cabbage to the rabbits?
ここでエサをあげてもいいですか。Koko de esa o agete mo ii desu ka.May I feed them here?
残ったエサは持って帰ります。Nokotta esa wa motte kaerimasu.I'll take the leftover feed home.
自転車を借りたいんですが。Jitensha o karitai n desu ga.I'd like to rent a bicycle.

Etiquette, timing and practical tips

The island's appeal depends on the rabbits staying healthy, and the guidelines are there for them rather than for show.

  • Do not pick up, chase or hold the rabbits, and never take one off the island.
  • Feed pellets or fresh leafy vegetables only; no bread, crisps, sweets or onions.
  • Put food on the ground away from roads and buildings, and watch until it is eaten.
  • Pets are not allowed on the island.
  • Go on a weekday if you can. Weekends and holidays bring far bigger crowds, and the rabbits are less hungry by afternoon.
  • Summer on the island is hot with little shade on the road. Bring water, a hat and sun cream.
  • Visit the Poison Gas Museum with the respect you would bring to any memorial.

Practise the visit before you go

The one conversation you are almost certain to have is at the shop at Tadanoumi port. It is short, and the assistant will probably add a reminder about the rules, so listen for kudasai ne, please do, at the end.

Then practise with a partner who answers back. In Unihongo, choose the Shopping topic and ask your AI Sensei to play the shop assistant at the port, adding a question about the ferry. Saying the lines once before you travel makes them feel natural when a queue is waiting behind you.

A four-line chat between a visitor and a shop assistant at Tadanoumi port, asking for rabbit feed and hearing the rule to take leftovers home, in Japanese with romaji
A short exchange at the port shop: buying rabbit feed and hearing the rule about leftovers.
JapaneseRomajiMeaning
うさぎのエサはここで買えますか。Usagi no esa wa koko de kaemasu ka.Can I buy rabbit feed here?
はい。島では売っていませんよ。Hai. Shima de wa utte imasen yo.Yes. It isn't sold on the island.
じゃあ、一袋ください。Jā, hito-fukuro kudasai.Then one bag, please.
食べ残しは持ち帰ってくださいね。Tabenokoshi wa mochikaette kudasai ne.Please take any leftovers home with you.

Official information

The Takehara tourism association publishes access details and the rabbit guidelines, and the island's hotel lists its facilities and any notices. Check both before you go, along with the ferry timetable.

Key points

A practical way to improve

Read the dialogue in this guide aloud until the feed-shop questions feel easy, then open Unihongo and choose the Shopping topic. Ask your AI Sensei to play the shopkeeper at Tadanoumi port: ask for rabbit feed, how many bags you need and what time the next ferry leaves, and ask the Sensei to answer at natural speed. Then try the Convenience Store Checkout mission, since the shops near the station also sell rabbit-safe vegetables. The session report afterwards lists your corrections and new vocabulary, so you step off the train ready to ask.

  1. 1

    Choose one clear goal

    Focus each session on a situation or skill you can actually use.

  2. 2

    Practice actively

    Say complete answers aloud instead of only reading or recognizing Japanese.

  3. 3

    Review and repeat

    Keep useful corrections and revisit the same skill until it feels natural.

FAQ

Frequently asked questions

How do you get to Ōkunoshima?

Take the JR Kure Line to Tadanoumi Station. Mihara, on the San'yō Shinkansen, is the usual place to change. From Tadanoumi Station walk about five minutes to Tadanoumi port, buy a ferry ticket and cross in around fifteen minutes. Ferries run regularly through the day; check the last boat back before you set off round the island.

Can you feed the rabbits on Ōkunoshima?

Yes, with the right food and in the right way. Bring rabbit pellets from the shop at Tadanoumi port or leafy vegetables and carrots from a supermarket near the station; no feed is sold on the island. Do not give bread, sweets or snacks. Put food on the ground away from roads and buildings, watch while the rabbits eat, and take leftovers with you so they do not attract crows and wild boars.

Can I pick up the rabbits?

No. The rabbits are wild, their bones are fragile and being held stresses them. The local guidelines ask visitors not to pick them up, chase them or take them away, and not to hand-feed, since rabbits see poorly and may bite fingers. Crouch down and let them come to you instead. Pets are not allowed to be brought to the island.

What does usagi shima mean?

Usagi is rabbit and shima is island, so usagi shima is simply rabbit island. The official name, Ōkunoshima, is written 大久野島: 大 big, 久 long time, 野 field and 島 island. When shima follows another word it often becomes jima, as in Miyajima, but here the name keeps the -no-shima ending.

Is the Poison Gas Museum on Ōkunoshima worth visiting?

Yes, if you want to understand the island. The small museum, opened in 1988, explains the army's secret gas factory, the workers who were harmed there and the weapons' use in the war. It takes about half an hour, charges a small entry fee and is a short walk from the hotel.

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