溝 こう Meanings Number 10^32; hundred nonillion Kanji 溝 ditch. Read as コウ. Words containing 溝 海溝 (かいこう) oceanic trench 側溝 (そっこう) gutter 地溝 (ちこう) rift valley And 23 more. Word lists JLPT N1 Jinuma: Japanese Dictionary · Word lists