Agriculture in japan
a. is possible on a significant scale on 80 percent of japanese land.
b. ended when uji, the yayoi leader, seized power after the battle of sapporo.
c. takes place entirely in the mountains, with no extensive lowland or plains areas except on the island of ryuku.
d. was fundamentally changed by the introduction of rice cultivation about 400
b.c.e.
e. was insufficient to take care of the population, thus japan depended upon importing rice.