They are in rough condition, but the quality of the art shines through! They appear to have been removed from stretchers at some point.
Losses to borders of canvas, paint losses etc. Both paintings by artist Minoru Tanabe, an important Japanese post war artist whose works are in the collection of the National Maritime Museum (London UK). Mauna Loa measures 20" x 26". Mauna Kea measures 22" x 26".