How to sit
You think you know how to sit in a chair? You don't know how to sit in a chair. Your movements are sloppy and your posture is highly questionable. You are a poor sitter. But you can always improve yourself. Here are some instructions for sitting in a chair, from a 1931 "Textbook of girls' etiquette" (Joshi reihō kyōkasho, 女子禮法教科書) by Ogasawara Seimei (a mounted archery teacher!) and MURATA Shiga 村田志賀 (a teacher; possibly a.k.a. MURATA Shigako 村田志賀子, another library-catalogue entry for early-1930s etiquette textbooks). Assumption: You are approaching the chair from the right.
1. Stand to the right of the chair. No slouching.
2. Placing your hand on the back of the chair, take one step forward with your right leg. (Bonus lesson: The word for "chair back" is kō, 靠.)
3. Take one step diagonally forward with your left leg, placing it in front of the chair (where it will be once you are sitting).
4. Letting go of the chair back, bring your right leg forward so that you are standing up straight in front of the chair.
5. Placing both hands on your lap, sit down. Be sure to sit up straight.
To stand up, reverse the procedure. Hands must remain on your lap as you rise.
Do not at any time cut your hair into a bob, smoke a cigarette, or dance to corrupting Hawaiian musics.
Leonardo Boiko:
I wonder if that Ogasawara yabusame is the same as the Ogasawara-ryū school of etiquette http://www.ogasawara-ryu.com/ (which, I understand, also does yabusame)? It appears there are some IP problems; from the second site:
> As the call for teachers of etiquette increased [during the Edo period], men describing themselves as "Ogasawara instructors". Appeared to meet of these "experts" had no genuine knowledge of Ogasawara manners. Instead, they concocted an exceedingly complicated "Ogasawara school" that was overly concerned with pomp and luxury, and worried itself with trifles.
In any case it seems the equation of the name “Ogasawara” with yabusame + etiquette runs deep.