In this study, we extracted 35 Chinese characters corresponding to syllable /am/(□) of Sino-Korean and 13 Chinese characters corresponding to syllable /ap/(□) of Sino-Korean in the Joyokanji Table(2010). Then we analyzed the correspondence relationship between the Sino-Korean and Sino-Japanese. Furthermore, we considered learning method to help learning Sino-Japanese, and the following conclusions were drawn. (1) Among all the 38 sounds /am/ of Sino-Korean, 31 sounds(81.57%) corresponding to /aN/ of Sino-Japanese. Therefore, It is necessary to learn the correspondence relationship of ①am⇒am>aN, and also need to learn about the final consonant /m/(ㅁ) of Sino-Korean is mostly appear as /N/(ン) in Sino-Japanese. (2) Among all the 21 sounds /ap/ of Sino-Korean, 11 sounds(52.38%) corresponding to /ou/ of Sino-Japanese, and 3 sounds(14.28%) corresponding to /aQ/ of Sino-Japanese and 2 sounds(9.52%) corresponding to /atu/ of Sino-Japanese. Therefore, First It is necessary to learn that /ap/(□) is corresponds to Ancient form /aΦu/(アフ) of Sino-Japanese. Furthermore, It is necessary to learn about the /Φu/(フ) is have changed 3 forms ①/u/(ウ), ②/Q/ッ/, ③/tu/(ツ). Furthermore, It is necessary to learn the correspondence relationship of ①ap⇒aΦu>au>ou, ②ap⇒aΦu>aQ, ③ap⇒ aΦu>atu.