They are sold under the name of Japanese cedar. If that is the same wood, they use them as siding in Japan with a burned finish.
Discussion
I meant the linseed oil… but yes, cedar a great option. I made a cedar “sandbox” once. Burned before installation. 
Oh sorry, the boiled linseed oil is used for the burned siding as a protection coat. I am learning that the more traditional finishes like varnish and oil weather WAY better than the water based modern finishes they sell now and if they do weather, they look good.
Cool sandbox!
