Bless in Japanese...

神さまが守るように is about as close as you can get to, “God Bless You” in Japanese.

This literally means “[May] God Protect [You].” It can also mean “God is Always With You,” as the word in this phrase that means “protect” can also mean to follow or be with. In fact, the Japanese dictionary entry for that word reads like this: to protect; to guard; to defend; to keep (i.e. a promise); to abide; to observe; to follow.

Note: Because this selection contains some special Japanese Hiragana characters, it should be written by a Japanese calligrapher.

This means “Bless this house” or “Bless this home,” in Japanese.

Some may also translate this as “Bless this family,” since the Kanji for home can also mean family.

Note: Because this selection contains some special Japanese Hiragana characters, it should be written by a Japanese calligrapher.

お大事に means “God bless you” in Japanese.

It can also mean “take care of yourself,” or “get well soon.” It's not always associated with religious meaning.

Note: Because this selection contains some special Japanese Hiragana characters, it should be written by a Japanese calligrapher.

恩 is often translated as “kind act from above,” as in “The Grace of God.”

This doesn't necessarily have to come from God. It could be a favor paid to you, or help that you received (or gave). Of course, you can decide for yourself whether the grace or favor given to you by a friend is actually a gift from God.

Other possible translations of this character:
Favor / favour, acts of kindness, merits, beneficial Influence, kindness, indebtedness, obligation, and benevolent influence.

神の恩恵 means God's Grace in Japanese.

The first two characters act to create a word that means “divine,” “God's,” or “The Spirit's.”

The last two Kanji mean grace, favor/favour, blessing, or benefit.