That is a modern bayonet not the old type 30 from the Second World War. It’s length is that of about the same as the modern PLA issue. Where the Banzi charge bayonet was built around the sword bayonet which would be twice as long. This is not a one of the previous generations I know of.
Japan Self-Defense Forces gets new rifle: Howa Type 20 Assault Rifle
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What we have here is a very modern iteration of the assault rifle. It resembles the Magpul Masada in terms of receiver and stock. This shouldn’t surprise as the Masada and in turn the Bushmaster ACR as well as the Type 89 are all derived from the AR18. On the ACR that stock is folding. Which may also be for the type 20. Making it more compact for parajumps or loading into a vehicle.
One of the neat features of the 89 was its built in Bipod this clearly shows that that That feature was deleted in favor of a grip pod. The Stock is adjustable for length of pull and cheek weld. The optic is Japanese a Deon Match F 1-8. Rail system is M1913 Milstd on the top with MLock on the sides and bottom. Perhaps the biggest shocker isn’t on the weapon.
Japanese SDF never adopted the M203 or a 40x46mm low velocity launcher favoring the type 06 rifle grenade launcher however this new rifle comes with this.
This is the Beretta GLX160 grenade launcher. Also note the HK SFP9 9mm pistol. These might just be for the SF units but would make excellent additions and replacements of existing systems.
Removable back up irons and that slot over the ejection port clearly indicates the charging handle. The magazine is a Pmag.