動力 can be used for motivation - it can also mean power/motion/propulsion/force. It can be anything internal or external that keeps you going.

動力 is the safest way to express motivation in Chinese. If your audience is Japanese, please see the other entry for motivation. 動力 is a word in Japanese and Korean, but it means “motive power” or “kinetic energy” (without the motivation meaning that you are probably looking for).

See Also:  Enthusiasm | Passion

やる気 means motivation in Japanese.

It also can be translated as willingness (e.g., to do something), eagerness, inspiration, determination, totally willing, fully motivated, and high aspirations.

Note: Because this selection contains some special Japanese Hiragana characters, it should be written by a Japanese calligrapher.

See Also:  Enthusiasm | Passion

動機 is a common word for motivation in Japanese and Korean.

In Chinese, it can have some bad connotations - so it's safer if your target audience is Japanese or Korean.

情熱 is the Japanese word that means enthusiasm or “passion for a cause.”

In some contexts, this could mean being extremely fond of something or having a fondness for a cause or person.

Can also be translated as passion, zeal, ardor/ardour, or fervor.

Note: This word (or character order) is not natural in Chinese. However, a typical Chinese person can guess this is a Japanese or Korean word and understand the intended meaning. This selection is best if your audience is Japanese or old-school Korean.

See Also:  Persistence | Devotion | Tenacity | Commitment | Motivation

Depending on the context, 熱情 can mean “cordial,” “enthusiastic,” “passionate,” or “passionately.”

This version is sometimes used in Japanese, but the character order is more common in Chinese and Korean Hanja. The meaning in Japanese for this Kanji order is ardor/ardour or zeal but rarely used in modern Japan. I suggest you choose a different version of “passion” if your audience is Japanese.

See Also:  Persistence | Devotion | Tenacity | Commitment | Motivation

気の強い means strong-willed or strong of heart in Japanese.

Here's the character breakdown of this Japanese title:
気 (ki) spirit; mind; heart; nature; motivation; intention; feelings; essence.
の (no) possessive particle.
強い (tsuyoi) strong; powerful; mighty; potent; resistant; resilient; durable.

Note: Because this selection contains some special Japanese Hiragana characters, it should be written by a Japanese calligrapher.