Nagaoka [Niigata prefecture Japan]

City of Nagaoka adopted emblem: 21 September 1977 by Notice No 35; adoption date of flag: Oct 11 1977 by Notice No 46. (links in Japanese

Flag proportion: 3:4
colour of field: orange
colour of emblem: blue

The shape of noble phoenix in blue represents the city Nagaoka which is striving to further develop as a regional core city with its own characters.

The ceremonial flag has gold fringe and gold kanji letters of Nagaoka city 長岡市.
Nozomi Kariyasu, 18 January 2006

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As Nozomi says, the shape of the indomitable phoenix represents the city developing without limit as a regional centre with charm/character. To me, it also looks like a stylised kanji naga 長 (long, head/chief).

The ceremonial flag is 90cm x 120cm. The emblem's colour is light blue. The simplified flag can be two sizes: 90x120cm or 180x240cm.
Jonathan Dixon, 7 March 2006