Iwafune [Tochigi prefecture Japan]

Iwafune town in Tochigi adopted its flag on December 1st 1966.

proportion: 7:10
field: purplish red
emblem: white
size of emblem is 13/21 of width.
stylized katakana Iwa (イワ); and kanji Fune (舟) which stands for peace and development.

Source: Iwafune website (in Japanese)
Nozomi Kariyasu, 19 November 2005

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i = イ wa = ワ fune = 舟 (boat)

The website mentions two sizes for the flag: large 140cm x 210cm and small 90cm x 135cm, despite giving proportions of 21:30 for any size. The emblem was adopted on the same date; the circle symbolises peace and the (wings?) unlimited development/advancement/progress. (I am not sure that development in this context is quite the same thing I would first think of when using that word in connection with local government.)
Jonathan Dixon, 9 December 2005