Sumida River the oldest and most famous firework displays in Japan, are launched from barges across the river, between Ryōgoku and Asakusa during Summer, a festival is also held at the same time. The poet Matsuo Bashō lived by the Sumida River, alongside the famous banana tree (Japanese: bashō) from which he takes his nom de plume. The Sumida River appears in a haiku by Issa from 1820: "spring peace--a mouse licking upSumida River" The Sumida runs through Tokyo for 27 kilometers, under 26 bridges spaced at about one bridge per kilometer. Amongst these, the principal ones are: Sumida River The is
Arakawa grids grid cell, e.g., at the grid center or at the grid corners. The Arakawa A-grid is the only unstaggered grid type. The "staggered" Arakawa B-grid separates the evaluation of the two sets of quantities. e.g., one might evaluate velocities at the grid center and masses at grid corners. The "staggered" Arakawa C-grid further separates evaluation of vector quantities compared to the Arakawa B-grid. e.g., instead of evaluating both east-west (u) and north-south (v) velocity components at the grid center, one might evaluate the u components at the centers of the left and right grid faces, and the v components at