Crossword Genius

Round Japanese train? (6)

Ross

I believe the answer is:

bullet

I'm a little stuck... Click here to teach me more about this clue!

This could be a double definition.

'round japanese' is the first definition.
'bullet' can be an answer for 'round' (thesaurus). I am unsure of the 'japanese' bit.

'train?' is the second definition.
(I know that bullet is a type of passenger train)

Can you help me to learn more?

(Other definitions for bullet that I've seen before include "Piece of ammunition" , "Have attraction" , "Projectile ammunition" , "Point in report" , "Revolver missile" .)

I've seen this clue in The Sun.
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