Sun in Chinese / Japanese...

日 is the word for sun.

It also means day and can refer to the day of the month when expressing the date.
Example: October 1st would be “10 Moons, 1 Sun.”

日 is also the first Kanji for the title of Japan (in Chinese, Japanese Kanji, and Korean Hanja). Thus, this character is used as an adjective for things that are Japanese.
Ever heard of Japan being called, “The land of the rising sun”? Well, that's what the full title of Japan means.

Depending on the context, this character can mean Sunshine or Sunlight.

Note: In Japanese, this Kanji has a variety of possible pronunciations. The pronunciation changed depending on context and how this Kanji is combined with other Kanji. When used alone, this is usually "hi" (pronounced like "hee") but sometimes it’s "nichi." When combined, it can be "tsu," "ni," "ka," and a few others.

This Chinese, Japanese, and old Korean character means morning sun, dawn, or rising sun.

It can also be the Japanese surname Kyoku or Asahi.

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.

太陽 is a two-character title for the Sun.

This refers specifically to Sol, the star at the center of our Solar system.

In Japanese, this is often romanized as Taiyou or Taiyo but can also be pronounced as the names Minami, Hiroaki, Hinata, Hikaru, Tsubasa, Tahi, Takayasu, Takaharu, or Soru.

朝日 is a version of the Japanese name Asahi.

This can also be Ahisa, Asuka, Ashita, or Asaka. This means morning sun and is the name of the famous beer company in Japan.

This would be read as “Zhao Ri” in Mandarin where it means morning sun but is also known to be the Asahi company (maker of beer and other beverages).

日月星 is the shortest way to write a title (or word list) that means Sun, Moon, Stars.

明日 is a common way to say “tomorrow” in Chinese and Japanese Kanji.

This temporal noun literally means “next sun[rise].” In addition to “tomorrow,” it can also mean “near future.”

In Japanese, this can also be the female given name Meibi.

日月星辰 is a title that encompasses all of the heavenly bodies or celestial bodies.

Namely, this includes the Sun, Moon, and Stars of our universe.

This old Buddhist phrase means, “When the sun rises it always shines first on the highest mountain,” or “When the sun appears, it first casts its light upon the highest mountain.”

This comes from the Avatamsaka Sutra and has been used as the name or portion of the name for temples in Japan and sites in China.

The Buddha's first round of teaching (Avatamsaka period) is likened to the time when the sun rises from the east horizon. When the sun first rises it illuminates the high mountains. In this analogy, the high mountains represent the great Bodhisattvas and/or those most ready to receive enlightenment and liberation.

This can be romanized from Japanese as “Nichi shutsu sen shō kō san,” “Nisshutsu saki teru takayama,” or “Hide temazu kōzan wo terasu yama.” The last one is probably the most common. Ask three Japanese people what they think the pronunciation is, and you will get three different opinions.

孫 is the name Sunn in Chinese (Mandarin).

孫 is the name Sune in Chinese (Mandarin).

This is a common Mandarin Chinese transliteration for the female Portuguese/Latin name Assunção or Assuncao.

天 means “heaven” or “sky” in Chinese, Japanese Kanji, and old Korean Hanja.

The context determines if you are talking about heaven or the sky above (often they are the same concept).

When combined with other characters, words like “today” and “tomorrow” are created. While sometimes the character for “sun” is used to mean “day,” often “sky” represents “day” in Asian languages.
Example: 今天 (this sky) = “today,” 明天 (next sky) = “tomorrow” in modern Chinese and Japanese.

In Chinese culture, regardless of which religion, it's almost always assumed that God (and any other deities) live up above the sky. The concept of God living in the sky is likely the reason heaven is associated with this character.
The equation goes something like this: God's domain is the sky, thus, the sky is heaven.

Note: As a single character, this is a little ambiguous, so you might want to choose our Kingdom of Heaven selection instead.

See Also:  Heaven | God | Today | Sun

This is how to write “day” in Chinese, Japanese, and Korean Hanja.

This can also mean “Sun,” the star in the middle of the Solar system in which we live. In Japanese, it can also mean “sunshine” or even “Sunday.”

When writing the date in modern Chinese and Japanese, putting a number in front of this character indicates the day of the month. Of course, you need to indicate the month too... The month is expressed with a number followed by the character for the moon. So “three moons ten suns” would be “March 10th” or “3/10.”

Note: This is also the first character for the proper name of Japan. Remember that Japan is “The land of the rising sun”? Well, the first character for Japan means “sun” and the second means “origin” so you get the real meaning now. Sometimes, in China, this sun character can be a short name for Japan or a suffix for something of or from Japan.

This is a common Mandarin Chinese transliteration for the male Spanish/Latin name Elson.

This is a common Mandarin Chinese transliteration for the male Spanish/Latin name Gerson.

This is a common Mandarin Chinese transliteration for the female French name Madisson.

This is the Mawangdui version of Daodejing chapter 54.