Translation guide
A device that produces smoke, used for concealment, signaling, or entertainment.
A device used by military or police to create a smoke screen for concealment or signaling.
Standard term for a smoke-generating canister used by military, police, or for emergency signaling.
The soldiers used smoke bombs to cover their retreat.
Specifically a smoke shell or grenade used to create a smoke screen.
The tank fired smoke bombs to obscure the enemy's vision.
Loanword from English, used in military or airsoft contexts.
The special forces threw in a smoke grenade before breaching.
A small device that produces smoke when ignited, often used for pranks, magic tricks, or photography.
Also used for small novelty smoke devices, though context will clarify it's not military.
He set off a smoke bomb in the bathroom as a prank.
Literally 'smoke ball', a traditional ninja tool or a small pyrotechnic that produces smoke. Often used in historical or entertainment contexts.
Loanword for a small smoke-producing ball, used in photography or as a toy.
Used metaphorically to describe a sudden vanishing act or a diversion.
発煙筒 is a general term for any smoke-generating cylinder, from military to emergency use. 煙幕弾 specifically refers to a projectile (shell or grenade) that creates a smoke screen. For most non-military contexts, 発煙筒 is sufficient.
The climber used a smoke bomb to signal for help.
Directly translating 'smoke bomb' as 煙爆弾 (けむりばくだん) is not standard and may not be understood. Use the established terms above.
The ninja vanished using a smoke bomb.
I bought colorful smoke bombs for a photo shoot.
Literally 'lay a smoke screen', used figuratively for creating a diversion or hiding the truth.
The politician threw up a smoke bomb to hide the scandal.