Maybe this bread wasn't a crash and burn like I wrote in my previous post, after all. After letting it rest overnight and using a sharper knife to slice, I got quite decent slices.
I made very easy open sandwiches with sliced cheese and ham, and they were not bad. If used better cheese and some vegetables, and/or some meat with a little spicy seasoning, I think this bread will make really nice and nutritious sandwiches. Now I'm glad that I gave this bread a try.
The recipe was again from the Japanese recipe site, and this seems to be a "quasi-" German bread recipe that was simplified and modified for Japanese home bakers. It is absolutely a no-brainer; you just mix and bake, without leavening. For this bread I used black sesame seeds and pumpkin seeds (which I bought by mistake. I thought I grabbed a bag of sunflower seeds at the store, but obviously I grabbed a wrong one. But I don't think pumpkin seeds ruined the taste of the bread).