Okususobana-shizen'en, (Japanese name 奥裾花自然園) is a small nature park located in the upper reaches of the Susobanagawa river (36°47'7.51"N 137°59'4.38"E). The nature park is famous for its Lysichiton camtschatcensis flowers.
Japan 2002/2015, "Mizubasho (skunk cabbage)".
Okususobana-shizen'en Nature Park.
The stamps were issued in the series "Flowers in Shinshū".
Shinshū was an old province of Japan that is nowadays Nagano Prefecture.