Tō-on or tōon (唐音, English: /ˈtoʊ.ɒn/ TOH-on; Japanese pronunciation: [toꜜːoɴ], "Tang sound") are Japanese kanji readings imported from China by Zen monks and merchants during and after the Song dynasty, as a form of on'yomi (音読み).

• On'yomi: Sino-Japanese readings
  • Kan-on: an earlier type of reading
  • Go-on: an even earlier type of reading