Era in Chinese / Japanese...

代 is the word used to designate dynasties in Asia.

代 alone can mean generation; age; period; historical era; eon; world; society; reign; era. 代 comes after the name of the dynasty, for example, the Tang Dynasty is the “Tang Dai” in Chinese.

Some have suggested that the word dynasty comes from the Chinese word “dai” (as “dai” sounds like the first syllable of a dynasty). However, the word dynasty is derived from the Greek word δυναστεία (dunasteia) meaning lordship and/or domination.

Sometimes this word is used in a different context where it can mean to represent or substitute. In this case, it can mean representative of; on behalf of; acting for, e.g. to offer incense in place of another.

In ancient Japan, this could also be a “shiro” (a unit of land area equal to one-fiftieth of a tan or about 20 square miles).

一世代 is a way to write “One Direction” in Chinese, referring to the British-Irish boy band.

They are commonly referred to as “1D” in Japan and China (no Chinese characters for that).

This title does not exactly mean “one direction.” It's closer to “one generation,” “one era,” or “one world.”

救世 is salvation in Chinese characters and Japanese Kanji.

This can refer to the saving, rescue, or salvation of one's life, the life or lives of others, a generation, an era, or even the whole world. As you can see, this is a rather generic and broad way to say salvation.

啟盛世開太平 means “To bring flourishing peace and security to the world (our current era).”

It's a wish that a new door leading to peace and prosperity could be opened to mankind.

Character and word breakdown:
啟 to open; to start; to initiate; to enlighten or awaken.
盛世 a flourishing period; period of prosperity; a golden age.
開 to open; to start; to turn on.
太平 peace and security; peace and tranquility; peace; tranquility.
I don't like to do breakdowns like this, as the words altogether create their unique meaning (encompassed in the main title above).

埃拉 is name Era in Chinese (Mandarin).

エラ is the name Era in Japanese Katakana.

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

時光 is a Chinese and Japanese word that means time, era, period of time, etc.

時光 is used as part of other words like “time machine” (時光機) or “happy time” (歡樂時光) (happy hour) in bars.

This can also be a surname or given name, Tokimitsu, in Japan.