A six-person relay team of Japanese masters swimmers from Tokyo's Ocean Navi completed their first crossing of the Tsugaru Channel yesterday. Under the helm of Captain Mizushima with the support of coordinator Masayuki Moriya and observer Motoko Honma, Kouji Kobayashi (小林功司 age 44), Etsuko Shima (島悦子 age 51), Yoshitaka Saito (斎藤好豪 age 43), Naoko Saito