日ソ にっソ Also written 日蘇 Meanings Noun Japan and the Soviet Union; Japanese-Soviet Kanji 日 day. Read as ニチ. Words containing 日ソ 日ソ中立条約 (にっソちゅうりつじょうやく) Japan-Soviet Neutrality Pact (1941) Jinuma: Japanese Dictionary · Word lists