She'll be missed, but I think wanting to retire before you get too beat up is fair. She's in her late 30's, so she's old by the average Joshi and she will want to be able to enjoy her non-wrestling life as best as she can. Though my exposure was limited to her, I've seen plenty of fun clips of her in DDT mixing it up with the guys and in TJPW as her "Sakisama" alter ego and genuinely felt it was a very interesting and refreshing character with her Neo-Biishiki-gun stable.
Thank you, Saki. May you enjoy a lovely final few months then blossom in your life outside of wrestling.