the tiny hole at the end of the penis, resembles eye of person of japanese extraction.

slang term for the small 'japanese eye' shaped hole at the end of the penis.

slang word for the opening at the end of a penis

Slit at the end of a penis representing a japanese persons eye, this is also where the sperm meets the world, can also be shortened to be japs

The british slang for the hole on the top of a man's penis.

OTHER SLANG FOR JAPS EYE:
wookie hole, upper sphincter, purple top, hole in the helmet

The external opening of the male urethra, appearing as a slit at the end of the penis. Perceived by Europeans to resemble the eye of a Japanese man, some consider the term racist, but it clearly isn't, because Japanese men have them too.

British slang <n> (Offensive)
The only externally visible part of the urethra on a male where semen and urine is secreted from the body.
Known as a 'Jap's eye' due to the similarity between the shape of the stereotypical Japanese eye and that the opening on the penis is much like a slit.
Although the phrase is not used in a directly racist manner, people of Far Eastern origin may take offence to the use of the term.