Uranus, Neptune, and Pluto
in Chinese, Japanese, and Vietnamese

 

The three outer planets, Uranus, Neptune, and Pluto, were discovered much later than the five planets known in antiquity and bear names in Chinese, Japanese, and Vietnamese that are direct translations of the Western ones, namely:

English	Uranus	Neptune	Pluto
Chinese characters	天王星	海王星	冥王星
Chinese reading	Tiānwángxīng	Haǐwángxīng	Míngwángxīng
Japanese reading	Tennōsei	Kaiōsei	Meiōsei
Vietnamese	Sao Thiên Vương	Sao Hải Vương	Sao Diêm Vương
Meaning	King of Heaven	King of the Sea	King of the Underworld

Note that the roots used in the Vietnamese names for the planets are the same as for Chinese and Japanese, except for Pluto, where Vietnamese uses the word Diêm (equivalent to 閻 / 阎 / Ch yán, J en) instead of Minh (冥 Ch míng, J mei). The meaning is basically the same, referring to the underworld.

Incidentally, the names deriving from the Five Elements were not the earliest names for the planets in Chinese. Some earlier or alternative names were:

English	Mercury	Venus	Mars	Jupiter	Saturn
Current name	水 星	金星	火星	木 星	土星
Chinese characters	辰星	太白星	熒惑 / 荧惑	歲星 / 岁星	鎮星 / 镇星
Chinese reading	Chénxīng	Taìbáixīng	Yínghuò	Suìxīng	Zhènxīng
Japanese reading	Shinsei	Taihakusei	Keiwaku	Saisei	Chinsei