https://en.wikipedia.org/wiki/2018_FIFA_World_Cup_squads#Japan
http://www.jfa.jp/news/00017671/
Japan
Goalkeepers:
1 Eiji Kawashima 川島 永嗣 (aged 35) (Metz)
12 Masaaki Higashiguchi 東口 順昭 (aged 32) (大阪飛腳)
23 Kosuke Nakamura 中村 航輔 (aged 23) (柏太陽神)
Defenders:
5 Yuto Nagatomo 長友 佑都 (aged 31) (Galatasaray)
20 Tomoaki Makino 槙野 智章 (aged 31) (浦和紅鑽)
22 Maya Yoshida 吉田 麻也 (aged 29) (Southampton)
19 Hiroki Sakai 酒井 宏樹 (aged 28) (Marseille)
21 Gōtoku Sakai 酒井 高徳 (aged 27) (Hamburger SV)
3 Gen Shoji 昌子 源 (aged 25) (鹿島鹿角)
6 Wataru Endo 遠藤 航 (aged 25) (浦和紅鑽)
2 Naomichi Ueda 植田 直通 (aged 23) (鹿角鹿角)
Midfielders:
17 Makoto Hasebe (captain) 長谷部誠 (aged 34) (Eintracht Frankfurt)
4 Keisuke Honda 本田 圭佑 (aged 32) (Pachuca)
14 Takashi Inui 乾 貴士 (aged 30) (Eibar)
10 Shinji Kagawa 香川 真司 (aged 29) (Borussia Dortmund)
16 Hotaru Yamaguchi 山口 蛍 (aged 27) (大阪櫻花)
8 Genki Haraguchi 原口 元気 (aged 27) (Fortuna Düsseldorf)
11 Takashi Usami 宇佐美貴史 (aged 26) (Fortuna Düsseldorf)
7 Gaku Shibasaki 柴崎 岳 (aged 26) (Getafe)
18 Ryota Oshima 大島 僚太 (aged 25) (川崎前鋒)
Forwards:
9 Shinji Okazaki 岡崎 慎司 (aged 32) (Leicester City)
15 Yuya Osako 大迫 勇也 (aged 28) (Werder Bremen)
13 Yoshinori Mutō 武藤 嘉紀 (aged 25) (Mainz 05)
Backup Player:
Takuma Asano 浅野 拓磨 (Vfb Stuttgart)
Yosuke Ideguchi 井手口陽介 (Cultural Leonesa)
Staff
Coach: Akira Nishino 西野 朗
Assisant Coach: Makoto Teguramori 手倉森誠
Hajime Moriyasu 森保 一
Conditioning Coach: Naoki Hayakawa 早川 直樹
Tomohiro Ogai 小粥 智浩
GK Coach: Yukiya Hamano 浜野 征哉
Takashi Shimoda 下田 崇