::I don't think it's necessary to find Matsumoto (1941), according to this it's only a piece of jawbone and molars, it also mention the 3.8m tall, 7.6m long skeleton in the Mie Prefectural Museum which is a cast of a Chinese "Stegodon huanghoensis", it also mentions that Stegodon miensis was smaller than it. Being a Chinese discovery will make easier finding info on this giant Stegodon, for example, all the issues of the journal Vertebrata PalAsiatica are available online for free on their website.