Mergers from April 1, 1999 to Present

• Merger: Shōnai Town (July 1, 2005)

The towns of Amarume

Amarume, Yamagata

was a town located in Higashitagawa District, Yamagata, Japan.On July 1, 2005 Amarume was merged with the town of Tachikawa, also from Higashitagawa District, to form the new town of Shōnai....

 and Tachikawa

Tachikawa, Yamagata

was a town located in Higashitagawa District, Yamagata, Japan.On July 1, 2005, Tachikawa was merged with the town of Amarume, also from Higashitagawa District, to form the new town of Shōnai....

 from Higashitagawa District

Higashitagawa District, Yamagata

is a district located in Yamagata Prefecture, Japan.As of 2003, the district has an estimated population of 67,663 and a density of 61.25 persons per km²...

 merged to form the new town of Shōnai

Shonai, Yamagata

is a town located in Higashitagawa District, Yamagata, Japan. It was created by the merger of the towns of Amarume and Tachikawa in 2005.As of 2005, the town has an estimated population of 24,921 and the density of 249.26 persons per km²...

.

• Merger: Southern Shōnai (October 1, 2005)

The city of Tsuruoka

Tsuruoka, Yamagata

is a city located in the Shonai region of Yamagata Prefecture, Japan.Tsuruoka is the second largest city in Yamagata Prefecture after Yamagata City...

, the towns of Fujishima

Fujishima, Yamagata

was a town located in Higashitagawa District, Yamagata, Japan.On October 1, 2005, Fujishima was merged into the expanded city of Tsuruoka, along with the towns of Haguro and Kushibiki, the village of Asahi, all from Higashitagawa District, and the town of Atsumi, from Nishitagawa District, and no...

, Haguro

Haguro, Yamagata

was a town located in Higashitagawa District, Yamagata, Japan.On October 1, 2005 Haguro, along with the towns of Fujishima and Kushibiki, the village of Asahi, all from Higashitagawa District, and the town of Atsumi, from Nishitagawa District, was merged into the expanded city of Tsuruoka and no...

 and Kushibiki

Kushibiki, Yamagata

was a town located in Higashitagawa District, Yamagata, Japan.On October 1, 2005 Kushibiki, along with the towns of Fujishima and Haguro, the village of Asahi, all from Higashitagawa District, and the town of Atsumi, from Nishitagawa District, was merged into the expanded city of Tsuruoka and no...

 and the village of Asahi

Asahi, Yamagata (Higashitagawa)

was a village located in the Higashitagawa District, Yamagata, Japan. The village was not related to the town of Asahi in the same prefecture or the adjacent Asahi in Niigata Prefecture.Asahi literally means "morning sun"...

 (all from Higashitagawa District

Higashitagawa District, Yamagata

is a district located in Yamagata Prefecture, Japan.As of 2003, the district has an estimated population of 67,663 and a density of 61.25 persons per km²...

) and the town of Atsumi

Atsumi, Yamagata

was a town located in Nishitagawa District, Yamagata, Japan.As of 2003, the town had an estimated population of 9,921 and a density of 38.84 persons per km²...

 from Nishitagawa District

Nishitagawa District, Yamagata

Nishitagawa was a district located in Yamagata, Japan.As of 2003, the district has an estimated population of 9,921 and a density of 38.84 persons per km². The total area is 255.40 km²....

 merged to form the new city of Tsuruoka

Tsuruoka, Yamagata

is a city located in the Shonai region of Yamagata Prefecture, Japan.Tsuruoka is the second largest city in Yamagata Prefecture after Yamagata City...

. Nishitagawa District

Nishitagawa District, Yamagata

Nishitagawa was a district located in Yamagata, Japan.As of 2003, the district has an estimated population of 9,921 and a density of 38.84 persons per km². The total area is 255.40 km²....

 was dissolved as a result. The Merger Council of Southern Shōnai

• Merger: Northern Shōnai (November 1, 2005)

The city of Sakata

Sakata, Yamagata

is a city located in Yamagata Prefecture, Japan.As of 2006, the city has an estimated population of 116,883 and the population density of 193.92 persons per km². The total area is 602.74 km².-History:The city was founded on April 1, 1933...

 and the towns of Hirata

Hirata, Yamagata

was a town located in Akumi District, Yamagata, Japan.On November 1, 2005, Hirata was merged into the city of Sakata, along with the towns of Matsuyama and Yawata, all from Akumi District....

, Matsuyama

Matsuyama, Yamagata

was a town located in Akumi District, Yamagata, Japan.On November 1, 2005, Matsuyama, was merged into the city of Sakata, along with the towns of Hirata and Yawata, all from Akumi District....

 and Yawata

Yawata, Yamagata

was a town located in Akumi District, Yamagata, Japan.On November 1, 2005, Yawata, was merged into the city of Sakata, along with the towns of Hirata and Matsuyama, all from Akumi District....

 from Akumi District

Akumi District, Yamagata

is a district located in Yamagata Prefecture, Japan.As of 2003, the district has an estimated population of 36,844 and a density of 57.99 persons per km². The total area is 635.31 km².-Merger:...

 merged to form the new city of Sakata

Sakata, Yamagata

is a city located in Yamagata Prefecture, Japan.As of 2006, the city has an estimated population of 116,883 and the population density of 193.92 persons per km². The total area is 602.74 km².-History:The city was founded on April 1, 1933...

. The Merger Council of Northern Shōnai.