不思議

The word describes a state where something cannot be explained by logic, reason, or current knowledge. While it is often translated as "strange" or "mysterious," it carries a nuance of intellectual curiosity or a sense of wonder, rather than just being "weird."

Compared to the word "hen" (変), which typically denotes something abnormal, inappropriate, or slightly off-putting in a negative sense, "fushigi" is more neutral or even positive. It is frequently used to describe the mysteries of the universe, magic, or unexpected but not necessarily "wrong" coincidences.

When used as a na-adjective, it describes the quality of the object or situation. When used as a noun, it refers to the phenomenon itself or the feeling of amazement. It is also common to see it used in the phrase "fushigi da" (It is strange/mysterious), which functions as a reaction to an inexplicable event.