Om in Chinese / Japanese...

噢姆 is how to write the phonetic way to say “om” in Chinese.

噢姆 is “om” as in the meditation sound used in yoga, Buddhism, and other meditation styles.

嗡香提 is the Chinese version of ॐशान्तिः or “Om Shanti,” the famous mantra or invocation of peace.

唵嘛呢叭咪吽 is the Avalokiteshvara mantra in Mandarin Chinese.

This chant is usually romanized as “Om Mani Padme Hum” from Sanskrit.

From Tibetan, it's “Om Mani Peme Hung.”

唵麼抳鉢訥銘吽 is one of the earliest and best-known mantras in the Buddhist tradition.

It can be heard in temples from Tokyo to Tibet.

This mantra is an expression of the basic attitude of compassion. It translates literally as “oṃ the jewel in the lotus hūṃ.”

There are several titles and transliterations for this mantra, including, 六字大明呪 (Great 6-syllable mantra), 六字真言 (6-syllable Sanskrit mantra of Avalokiteshvara bodhisattva), 唵嘛呢叭咪吽, 唵嘛呢叭咪哞, and 唵嘛咪叭呢哞.
Contact me if you need any of these alternates on your wall scroll.