When I place face-up Life cards back in my Life area according to this [On Play] effect, do I place them face- down?

No. You must place face-up Life cards face-up, and face- down Life cards face-down.

[ST13-016_p3] - Yamato (Starter Deck 28: GREEN/YELLOW Yamato: Reprint) - One Piece Card Game

[ST13-016_p3] - Yamato (Starter Deck 28: GREEN/YELLOW Yamato: Reprint)

Card Description

[Rush] (This card can attack on the turn in which it is played.) [On Play] Look at all your Life cards; place 1 at the top of your deck and place the rest back in your Life area in any order. <span style="color:red">DISCLAIMER: This card is a reprint of the pre-existing card in the ST13 set. The main difference between this card and the original print is the inclusion of "EN" on the right side, by the copyright information.</span>