Hamana District, Shizuoka

• On July 1, 2005, the towns of Maisaka and Yūtō, along with the cities of Tenryū and Hamakita, the town of Haruno, the towns of Hosoe, Inasa and Mikkabi, the towns of Misakubo and Sakuma, and the village of Tatsuyama, were merged into the expanded city of Hamamatsu; this left district with one municipality.
• On March 23, 2010, the town of Arai was merged into the expanded city of Kosai. Hamana District was dissolved as a result of this merger.

  District Timeline

• October 1, 1955 – The village of Sekishi was merged into the city of Hamamatsu.
• March 31, 1957 – The villages of Irino and parts of Koto were merged into the city of Hamamatsu.
• October 1, 1960 – The village of Koto was merged into the city of Hamamatsu.
• June 20, 1961 – The village of Shinohara was merged into the city of Hamamatsu.
• July 1, 1963 – The town of Hamakita was elevated to city status.
• July 1, 1965 – The village of Shonai was merged into the city of Hamamatsu.
• January 1, 1972 – The town of Kosai was elevated to city status.
• May 1, 1991 – The village of Kami was merged into the city of Hamamatsu.
• July 1, 2005 – The towns of Maisaka and Yūtō, along with the cities of Tenryū and Hamakita, the town of Haruno, the towns of Hosoe, Inasa and Mikkabi, the towns of Misakubo and Sakuma, and the village of Tatsuyama, were merged into the expanded city of Hamamatsu.
• March 23, 2010 – The town of Arai was merged into the expanded city of Kosai. Hamana District was dissolved as a result of this merger.