The manhole cover, installed in February 2024 to mark the 70th anniversary of Morioka’s municipal sewer system, features several of the city’s prominent symbols: - Sansa Odori – two dancers performing the traditional dance associated with Morioka, which is held annually as part of a local summer festival. - Mount Iwate and the Kitakami River. - Japanese water irises, the official flower of the city. - Cherry blossoms.
Translation of the text on the cover: 70周年記念 - 70th Anniversary 盛岡市下水道 - Morioka City Sewerage System