Furuta Sensei started class with 天略宇宙合掌 Ten Ryaku Uchū Gasshō. It is a both kamae and a mudra. He went into the physical nature of the kamae first.
my Bujinkan Kuden covering 妙剣 Myōken and 突き構え Tsukigamae. Myōken is a mudra. And tsukigamae are different approaches to tsuki with a 短刀 tantō.