Namo Shakyamuni Buddha in Chinese / Japanese...

南無釋迦牟尼佛 is a Buddhist chant or prayer of respect to the Shakyamuni Buddha.

Some will translate this as the Buddhist vow.

The first two characters, 南無, are sometimes translated as “amen”; others will translate it as “belief in” or “homage to.”
To expand on this, 南無 can also mean “taking of refuge in” while representing devotion or conviction. 南無 as with most religious concepts or words, different people or denominations will have varying definitions.