Nature Center (Inside Kokaigawa Fureai Park)

Commune with great purple emperors—Japan's national butterfly—and rich nature

The building of the Nature Center is uniquely shaped like a great purple emperor butterfly, which is Japan's largest and the national butterfly.

It features a small aquarium and a specimen exhibition of great purple emperors, both of which are fun for adults and children.

Its adjoining kids' play area has a lot of playground equipment for children to energetically play on.

Located inside Kokaigawa Fureai Park in a rich natural environment, this facility provides a stunning view of Mt. Tsukuba.


The appearance of the Nature Center

Seasonal highlights

Kokaigawa Fureai Park features beautiful seasonal flowers.

Cherry blossom

Cherry blossom
(late March to early April)

Rape blossom

Rape blossom
(late March to mid-April)


(mid- to late May)

Common marigold

Common marigold
(late May to mid-June)


(late October to early November)



Kokaigawa Fureai Park Nature Center


1650-1 Horigome, Shimotsuma City, Ibaraki


Public transportation

Take the Kanto Railway Joso Line to Shimotsuma Station. Take the Shimotsuma Community Bus "Shimonchan" to Kokaigawa Fureai Koen Park Stop.


About a 25-minute drive from the Ken-O Expressway Joso Interchange. About a 35-minute drive from the Kita-Kanto Expressway Sakuragawa-Chikusei Interchange.

  • Parking available

Opening hours

[April to October] 9:00 a.m. to 4:30 p.m.
[November to March] 9:00 a.m. to 4:00 p.m.

Closed on:

Mondays (or the following day when it falls on a national holiday) and December 29 to January 3

Contact information