Submarine

I read Itaru Tomiya 'Yoji Yukugo no Chugokushi' (Iwanamishinsho)
He supports Sorai Ogyu's theory; 'On' in 'Onko Chishin' may be not 'tazuzeru' but 'atatameru.'
They exhibit a submarine at SD Marine Museum in Kure ciry, Hiroshima.