Arakawa, Tokyo Nature Park Public elementary and middle schools are operated by the Arakawa City Board of Education. Public high schools are operated by the Tokyo Metropolitan Government Board of Education. The Tokyo First Korean Elementary and Junior High School (), a North Korean school, is in the ward. The metropolis operated the Tokyo Metropolitan College of Aeronautical Engineering in Arakawa until 2010. Additional facilities are under construction. Arakawa, Tokyo Arakawa has sister-city relationships with Donaustadt in Vienna, Austria, and with Corvallis, Oregon, U.S. Domestically, it has similar relationships with nine cities, towns and villages. As of May 1, 2015, the ward
Arakawa grids Arakawa grids The Arakawa grid system depicts different ways to represent and compute orthogonal physical quantities (especially velocity- and mass-related quantities) on rectangular grids used for Earth system models for meteorology and oceanography. For example, the Weather Research and Forecasting Model uses the Arakawa Staggered C-Grid in its atmospheric calculations when using the ARW core. The five Arakawa grids (A-E) were first introduced in Arakawa and Lamb 1977. For an image of the five grids, see the following picture, or Fig. 1 in Purser and Leslie 1988. The "unstaggered" Arakawa A-grid evaluates all quantities at the same point on each