Wood block print. Oriented with north to the upper right. Covers Matsumae to Tsushima, Yakushima, and Ogasawara. Covers 松前 to 對馬, 屋久島, and 小笠原. Includes texts on latitudes and longitudes and tides. Shows latitudes and longitudes and kuroshio. Shows distance of the sea routes. Includes legend. Based on a map by Nagakubo Sekisui. Based on a map by 長久保赤水. Preface by Shiba Kunihiko, dated An'ei itsubi . Preface by 柴邦彦, dated 安永乙未 .
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