大神 in Chinese / Japanese...

大神 is Okami, an honorific title for God (used in Shinto and other religions).

If you directly translate this, you get something like “Big Spirit” or “Great Spirit.”

There are other titles that romanize as "Okami" in Japanese, so make sure this is the right meaning for you. Another common okami means wolf but is a completely different Kanji and meaning.

天照大神 is the Japanese Shinto deity often referred to as the Sun Goddess.

The full name is often romanized as Amaterasu Oomikami/Omikami.
Sometimes also written as 天照大御神 (just the addition of 御 near the end) or 天照皇大神 (with 皇 added in the middle).

天照皇大神 is the title for Sun Goddess or Amaterasu Oomikami in Japanese.

Rare Chinese Buddhists/Shitoists may be familiar with this (so I have included the Chinese pronunciation above) however, this should generally be considered a specifically-Japanese title.

Besides Amaterasuoomikami, this can also be pronounced/romanized as Tenshoukoudaijin. There are several similar ways to write Sun Goddess in Japanese, so don't be surprised if you see different forms on the web, etc.

This is the Heart Sutra in Chinese as translated by Xuanzang.

The Heart Sutra is often cited as the best-known and most popular of all Buddhist scriptures.

Notes: There are too many characters for this to be done by the economy calligrapher. You must choose a Master Calligrapher.

With this many characters, and the fact that one tiny mistake wipes out hours of work, keep in mind that writing the Heart Sutra is usually a full day of work for a calligrapher. This work and personal energy should be cherished and respected. In other words, the calligrapher is not charging enough money for the value that you are getting here.

Also, you will find that as my server processes 260 characters, the customization process is a bit slow for this title.