Chikusa is one of the 16 wards of the city of Nagoya in Aichi Prefecture, Japan. As of 1 October 2019, the ward had an estimated population of 165,863 and a population density of 9,123 persons per km². The total area was 18.18 km².

The Higashiyama Line is a subway line, which forms part of the Nagoya Municipal Subway system in Nagoya, Japan. Officially, the line is referred to as Nagoya City Rapid Railway Line 1 . It runs from Takabata in Nakagawa Ward to Fujigaoka in Meitō Ward, all within Nagoya. The Higashiyama Line's color on maps is Windsor yellow; its stations carry the letter "H" followed by a number. All the stations accept manaca, a rechargeable contactless smart card.