Kanji and symbol translation

[Dylancsexton]

Good evening kanji reading superstars. Was wondering if I could get a little help on this kanji and shibata look a like symbol. Thanks as always for the help. Cheers.

Dylan Sexton

 

[mengwong]

Sakai something-something

https://en.wikipedia.org/wiki/Tomoe
https://ja.wikipedia.org/wiki/貞宗
Not sure how useful I’m being, here