[Ikeon]

Very few guns in Japan, Homemade shotgun. Where’d he get the shells?

[Houserino]

Why ‘gun control’ never can work, anyone with any effort can make tubes and gunpowder. It’s 700 year old easy tech to do.

[skr]

If a gun can be homemade, cannot the shells also be homemade? Just curious.

[Eleutheria5]

Salt peter, charcoal and sulfur, and then some ball bearings encased in a paper wrapping. What’s the problem?

[Vaquero]

Could be a homemade muzzle loader. Matchlock ignition. Powder can be made with sulfur, saltpeter and charcoal

[BlackbirdSST]

Where’d he get the shells?

A black powder shotgun doesn't require 'shells'.

[2harddrive]

“Very few guns in Japan, Homemade shotgun. Where’d he get the shells?”

From the huge cloud of smoke, it looks like it was straight black powder, probably also homemade. But he could also have made it from disassembled fireworks.

[Blood of Tyrants]

A witness mentioned a white cloud of smoke. Home made black powder?

[miserare]

Internet?

[Clutch Martin]

“Where’d he get the shells?”

I think it was kind of a Muzzleloader that was electronically fired. He might have fabricated the charge. Zap/Boom.

Slow burn/low boom (Boston marathon bomb).

Slow burn/low boom is a good indicator of improvised munitions. (Kinda common knowledge nowadays)