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At that time, they corresponded to three-star rank, two-star rank and one-star rank respectively. パンツァー 1998年4月号 125頁。アルゴノート社。(PANZER April 1998 issu page.125 Argonaut.Inc.)
世界の艦船増刊第59集 海上自衛隊の50年 22頁。海人社 (SHIPS OF THE WORLD a collection of 59th edition "50 years of the Maritime Self-Defense Force" page.22 Kaijinsha.)