Building a Tenma-Zukuri Chabune (伝間造茶船) – Part 4

Uwakoberi, Koberi, and Iron Nails

So, with the koberi in place, I added the small deck at the bow and the ōtoko at the stern. I’m trying to find out the term for these small decks, which are more like steps. On the Hozugawa boats, the small deck at the bow is called omote-amaose. But, that’s an entirely different region, so I expect the term in Tokyo/Edo would be something quite different.

I also added the uwakoberi, which is what in the west, one would refer to as the gunwale or caprail. Each was made from a single piece of wood, wide enough to cover the edges of the hull planking and rub rail. I made mine a little wider, so that there is a slight overhang on the inboard side.

On tenmasen, the uwakoberi could be quite wide, serving as a walkway for the boatmen. I wanted to keep true to the Funakagami print, so I didn’t go too wide on this. Also, I had a hard enough time putting a bend in the wood. Any wider would have just made this task more difficult.

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Wasen Models in Miniature – A Hozugawa Downriver Boat

After completing the Hozu river diorama and showing photos to people, I got back some very good comments that led me to think about making a gift shop sized model of a large Hozugawa kudari boat, or downriver boat. These boats are fiberglass now, but they are based on a wooden boat that the river tour company commissioned many years back by the last boat builder of the region.

My Hozu river diorama

Douglas Brooks was kind enough to share a drawing of the boat that he obtained in Japan. I worked out the measurements, and the boat comes out to about 33 feet in length. Figuring a nice sized desktop model should be no more than about 10 or 11 inches long, that would put it at about 1/40 scale. That’s actually not that miniature, but for a boat of this type, it’s certainly miniature enough. Plus, it’s large enough scale to allow me to show some planking detail and maybe forgo the fastenings detail.

A modern fiberglass (FRP) version of the Hozugawa kudari boat.

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Building a Tenma-Zukuri Chabune (伝間造茶船) – Part 3

Construction of the model continues as I’ve been working out how I want to tackle some of the details on this 1/20-scale model. The major issues to deal with are the copper mortise covers and other copper detailing as well as the detailing of iron nails used to fasten the koberi, or rub rail, plus wire nails used to fasten the uwakoberi, or the caprails. Some of this is quite simple.

Below, I’ve posted a photo of Japanese modeler Kouichi Ohata’s Tenma-zukuri chabune. He has been helpful in the adjusting of the design of the drawings and has completed a model based on the drawings.

His model is built at 1/10 scale. I may eventually build one at this scale, but for now, I’m happy building mine in 1/20 scale, and I’m considering building other wasen of the Funakagami in 1/20 scale also. It saves on space!

Photo of Japanese modeler Kouichi Ohata’s 1/10-scale Tenma-zukuri chabune based on my plans, with a few modifications and added details.

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