Long before the rise of the Ten-Tails and the Hidden Villages, Hi no kuni's massive forest was known as the Forest of Death and the ancestral home of the Sarutobi clan. The Forest covers majority of the Fire Nation, reaching to the Hanguri Gulf coast and ending at the Hanguri Peninsula. The forest has a vast range of unique fauna and flora; because chakra is the source of all life on the planet even the animals and plant life of Hi no kuni could prove disastrous for citizens and let alone foreigners. As a tribute to the Sarutobi clan and the Shodaime Hokage: Sarutobi Kyoraku; Konohakure no Sato was founded within Shi no Mori. Because of this, it is one of the few true "Hidden" villages in the world. While many of the natives have largely tamed the lands, the forest of death that surrounds Konohagakure are quite wild to most visitors. With the majority of the nation being unspoiled forest, jungle and mountain ranges.

Tajima Delta is a very large, swampy inland delta formed where the lower reaches of the River country's rivers, spreads out, slows down and flows into the south-western part of Hi no kuni, filling the areas extensive floodplains and marshes. Like the rest of Hi no kuni, the Tajima delta is inhabited by numerous unique animals and plant life. There is also a guardian tribe native to Hi no kuni that calls the delta home. The tribe is known as the Nerus, who are more feral than the Torran of the northwest. Because of this only power and strength were able to swayed them to be loyal to Hi no kuni and it's hidden village. The Nerus people build their villages along the rivers of Tajima delta, as the Nereids that live within the rivers are their primary source of food.