Help w/Japanese watercolor? Woodblock print?

A friend of mine who buys storage units at auction came by last night with 4 Rolling Stones & 1 Rod Stewart concert t-shirt shirts all from 1989 concerts that he wanted to sell me - and they were being used to wrap & protect these 2 Japanese pieces!

I ended up buying the box & it's contents from him, and I'd like to know more about these 2 pieces that someone used Rolling Stones concert tees to protect!

Can anyone tell me what they are? (watercolor? woodblock prints? hand colored prints?
They are really beautiful up close.

Can anyone tell who the artist was? And finally, how old are they?

Thanks, I appreciate any help with these!