羽田 is the kanji-borrowing of Japanese 'Haneda' (はねだ):
羽 (Hane, 'wing/feather') +
田 (Da, 'field') — 'wing field'. Tokyo's two big airports are
羽田 (Haneda, domestic + some international, very close to the city) and
成田 (Narita, the main international hub).
羽田 is also a Japanese family name; the most prominent bearer was Hata Tsutomu (
羽田孜), Japan's prime minister in 1994.