. . "研治" . "ナガイ" . "永井研治" . . "Nagai"@en . . . . . "永井研二" . "永井研二" . "永井研治" . "ケンジ" . . "研治 永井"@ja-JP . "永井研二" . . "永井" . "永井研治" . "Kenji"@en . "Kenji Nagai"@en . . "Kenji Nagai" . "ケンジ ナガイ" .