About OKADA HIRAKU
About 東京都市大 環境情報
About 東京都市大学環境情報学部紀要
About aging society with a falling birthrate
About driver
About travel behavior
About automobile
About investigation
About person trip survey
About pattern classification
About old age driver
About retention circumstantial investigation
About Transport traffic and service in general
About 交通
About 行動
About 自動車
About 保有
About 傾向