The tidbit about the studio sign was really interesting, more so that the author has gone to such length to use period-accurate letters, Noda-sensei really goes above and beyond to make his story, and as always your work translating and researching these pieces of information is much appreciated, really i dont have enough words for how much.
Oof that is some expression Tsukishima is making, a little more and that vein will pop but i can't remember exactly why would he is so angry, if it was hinted in the past the reason or it is a personal realization of his that makes him knowing that Tsurumi had a wife and daughter angry.