YAMASHITA KISEN K.K.

Loughran confirms the buff funnel colour. The change from Y4 is dated to 1937, when Choko Maru carried Y5, apparently an unrepeated experiment; Y3 was used instead with a stylised Mon-shaped Y. Jordan’s monochrome photograph of Yosida Maru No. 1 confirms Y3. Stewart 1957 shows only small ring segments, and FOTW’s flag is taken from Stewart.