Kasaoka City Horseshoe Crab Museum
The world's only museum devoted to horseshoe crabs, with a full-size dinosaur park attached.
piggybackjapan.com
Kasaoka City Horseshoe Crab Museum
SaveThe world's only museum devoted to horseshoe crabs, with a full-size dinosaur park attached.
Children handle real trilobites and ammonites, then brush sand away to dig fossils out themselves.
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An observation room overlooks the horseshoe crab breeding ground, a national natural monument. Live adults swim in a large tank and larvae are reared in the breeding room. Outside, eight full-size dinosaurs of seven species stand in a park with a playground in one corner. They were built under academic supervision, down to the wrinkles in the skin. A crank makes a model horseshoe crab move its legs and tail spine. Children get a coloring sheet at the door and fill it in a room shaped like a compound eye.
| Kids' price & free conditions | Yes | High school ¥300 and primary/junior high from outside the city ¥200 against ¥500 for adults. Primary and junior-high children living in or schooled in Kasaoka enter free with the Kasaoka-kko passport. Nothing is stated about children below school age | Web-checked | checked Aug ’26 | city.kasaoka.okayama.jp |
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| Stroller friendly | Not checked yet | ||||
| Stroller rental | Not checked yet | ||||
| Diaper changing table | Not checked yet | ||||
| Nursing space | Not checked yet | ||||
| Family restroom | Not checked yet | ||||
| Diaper disposal bin | Not checked yet | ||||
| Kids' toilet seat & step stool | Not checked yet | ||||
| Elevator | Not checked yet | ||||
| English support | Not checked yet | ||||
| Indoor / outdoor | Not checked yet | ||||
| Outside food allowed | Not checked yet | ||||
| Steps & slope caution | Not checked yet |
Worth a look before you go
Japanese · opens translatedFirst-hand
Under two hours from Hiroshima: the Kasaoka City Horseshoe Crab Museum
5- and 7-year-old: a quiz film every 20 minutes, a controller moving the crab's legs and tail, a free colouring sheet.
mrs.living.jp2023
Japanese · opens translatedOfficial
New play structures keep arriving: five big parks in Kasaoka
The climbing frame is the DHINOSAUR TREE, half tree half dinosaur. Eight dinosaurs stand across desert, sea and forest.
okayama-kanko.jp2023
Japanese · opens translatedFirst-hand
We went to the Horseshoe Crab Museum in Kasaoka, Okayama — a museum report
August, three sisters aged 7 to 12. Cool inside, clean toilets, and the females carry the males - that won them over.
ameblo.jp2025
Japanese · opens translatedFirst-hand
A field trip to the Horseshoe Crab Museum and Bay Farm
Three- to five-year-olds counted the crabs' legs, pressed the quiz buttons, dug for crabs in sand: over an hour inside.
mayashimo-manmaru.com2025
Kasaoka City Horseshoe Crab Museum · Links & reads ▾
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Basics
- Fee：General ¥500 · high school ¥300 · primary & junior high from outside the city ¥200. Groups of 20 or more: ¥400 / ¥250 / ¥150. Annual passports ¥1,500 / ¥900 / ¥600. Prices were lowered on 1 April 2026. Free for primary and junior-high children living in or schooled in Kasaoka (show the Kasaoka-kko free passport), for primary children with a Takahashi River Basin passport (weekends and holidays only), and for a disability certificate holder plus one carer■
- Hours：9:00-17:00, last admission 16:30. The dinosaur park keeps the same hours and closes when the museum does. Closed Mondays (the next day if that Monday is a holiday), the day after a public holiday, and 29 December to 3 January — but open every day from 25 March to 10 April, 27 April to 10 May, and 15 July to 31 August■
- Time needed：120 min
- Booking：No reservation is mentioned for general admission. Annual passports are sold as well as single tickets■Official booking site ↗
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