As reported elsewhere, only one sekitori is absent from the start of this basho:
Yokozuna Terunofuji
And the lower division kyujo:
Ms56w Oki
Sd18w Kirinofuji
Sd37w Oshoryu
Sd47e Haruminato
Sd47w Kaigo
Sd60e Kyokushori
Sd60w Koki
Sd75w Suio - recovering after back surgery, but hopes to be back for the Natsu basho.
Sd79w Michihaya
Sd90w Ishiura
Jd14w Kotoegashira
Jd36w Nakashima - had emergency surgery after the leg injury he suffered in November, now recovering.
Jd73w Hokutoyakumo
Jd85w Sakurai
Jd94w Kotofuno
Jd95w Minorufuji
Jk4w Nakaishi
Jk5w Chiyotsurugi
Jk6w Chiyotensho
Jk10e Motokiyama
Jk10w Yoshinofuji
Jk11e Ryubumaru - recovering from knee surgery.