The funnel is documented in a port-side photograph of Rich Duke II taken on 5 July 2013.
Mitchell shows four other funnels, probably those of charterers. Two appear to be Mitsui and Kawasaki, listed as major customers on the company website in 2013; the other two remain unidentified in Rosanoski’s Japanese livery material.
The Osaka company was formed on 30 September 1974. Its operating companies included Dojima Kaiun, formed in Osaka in 1986.
Japan, Osaka.
Keep the explicit scope label independent; no alias or company identity is inferred.