Rinse the 1½ cups short grain Japanese rice by filling the bowl containing the rice with cold water then draining and repeat until the water is almost clear. Drain the water using a colander.
1½ cups short grain Japanese rice
In a heavy iron pot with a lid, bring the 1 ⅔ cups dashi stock, 1 tablespoon evaporated cane sugar, 1 tablespoon mirin and 1 tablespoon soy sauce to a boil.
1 ⅔ cups dashi stock, 1 tablespoon mirin, 1 tablespoon evaporated cane sugar, 1 tablespoon soy sauce
Add the ⅓ cup bamboo and rice and let it return to a boil. Cover and turn the heat down to low, cooking until you don't see any more steam escaping, about 15 minutes.
⅓ cup bamboo
Add the ¼ cup mitsuba and 1 package unagi on top of the rice, turn off the heat, cover and allow it to steam for 10 minutes.
¼ cup mitsuba, 1 package unagi
Break up the unagi and fold it into the rice then serve immediately with some Japanese pickles.