takes genitive case の, 'taru' adjective, adverb taking the と particle

Messages.yoji.
  1. fair and square, open and aboveboard.

Variations

Pronunciation Kanji Kana Is Common
正々堂々 せいせいどうどう
正正堂堂 せいせいどうどう

Contained Kanji Breakdown

correct, justice, righteous
セイ ショウ ただし (1st, N4)
one, one radical (no.1)
イチ いっ ひと- (1st, N5)
stop, halt
と.まる シ どめ (2nd, N4)
divining, fortune-telling, divination or katakana to radical (no. 25)
ボク うらな.う うらない (Kentei Pre-1)
repeated kanji symbol
public chamber, hall
ドウ (4th, N4)
esteem, furthermore, still
ショウ なお たか (9th, N1)
desert, border prairie, the 1st form is radical 13
キョウ ケイ まきがまえ
upside-down box radical (no. 13)
キョウ ケイ (Kentei 1)
mouth
くち コウ ク (1st, N4)
soil, earth, ground
ド つち は (1st, N5)