While I have never eaten Japanese bread and didn't know they were a bread baking nation, apparently they make happy bread. Like "Great cheese comes from happy cows, happy cows come from California". P.S.... I like food...
The bread is happy in the end, but that step 5 looks a little brutal. I get the gas thing, little loaf of bread. You're in good company.
I want to seek out and marry the (hopefully male, hopefully not old) illustrator for Hitachi.
Haha! This diagram completes me.