Land of Toads introduction missions:
After getting level 30,toad hermit Hitsutomo will appear at your mission desk.
He needs help at acquiring few things to get back home.
Land Of Toads IFirst you need to bring him Leaf from Elder Tree.
You can find leaf at Dark forest.
Land Of Toads II
After completing previous mission Toad hermit will want 20 DNA.
After Completion of both missions you will be grant access to Land Of Toads(You can teleport by talking with Toad at your village for 50 Ryo)