The name Hello in Chinese / Japanese...

你好 is the day-to-day way to say hello in Chinese.

The characters literally mean, “You good?” It's the equivalent of “What's up?” in English, where nobody expects an actual answer.

This explanation is here for educational purposes only. 你好 is an oral word that is not appropriate for a scroll (not a bad meaning, just very odd for a wall scroll).

ハロー is the English “hello” transliterated into Japanese Katakana.

Note: Because this title is entirely Japanese Katakana, it should be written by a Japanese calligrapher.

This colloquial Japanese greeting means hello, or good day.

こにちわ is the common greeting for daytime or afternoon (after morning, before the sun sets).

Note: Because this title is entirely Japanese Hiragana, it should be written by a Japanese calligrapher.

The word namaste comes from Sanskrit and is a common greeting in the Hindi and Nepali languages exchanged by devout Hindu or Buddhist people in Southern Asia (especially India).

合十 is the Chinese form (not well-known in Japan) of this word which is used to describe a Buddhist (or Hindu) greeting with palms closed together prayerfully, generally at chest level. However, this selection of characters describes the act and is not a word spoken during the greeting. Words or a greeting are seldom spoken when two Buddhists meet. The greeting is silent and respectful but composed completely of body language.

Note that the greeting namaste and the act of placing palms together are used both as a hello and goodbye (like the word aloha in Hawaiian).

If you are looking for a welcoming hello and goodbye, you may want to consider gassho or a simple welcome.