Shingon of Houtou Nyorai.

"naumaku sanmanda bodanan" = a devotion to the Buddhas/"homage to all the Buddhas"
"nan naku sowaka" = a general reverence

Also read as: ノウマク・サマンダボダナン・ラン・ラク・ソワカ
naumaku sanmanda bodanan ran raku sowaka - namaḥ samantabuddhānāṃ raṃ raḥ svāhā