Tajimagahara, Special Natural Monument grassland in Sakura-ku, Japan

Tajimagahara is a protected grassland covering about 4 hectares, dominated by dense Miscanthus sinensis and populated with numerous rare plant species. The landscape is maintained through regular burning and cutting to preserve the ecological balance.

Tajimagahara's primrose colony was designated a Natural Monument in 1920, making it Japan's first such site, and was upgraded to Special Natural Monument in 1952. The designated area was renamed Tajimagahara Primrose Colony in 1957. From 1961 the land was gradually brought into public ownership, and in 2001 the newly formed Saitama City became its managing body.

Local people used this grassland during the Edo period to harvest Miscanthus sinensis for thatching roofs in their homes. This long-standing practice shaped how the landscape looks today and remains part of the region's cultural memory.

Visitors can experience the grassland best during autumn when the plants display their seed heads. Educational signs throughout the area explain the local flora and ongoing conservation work.

The reserve is fenced off and visitors may only view the primroses from a walkway; each winter the Saitama City Board of Education burns the grass to maintain the habitat.