Seems like a very nice travel charger - includes long power cord and AU/EU/UK adaptors.
As far as I understand Zyron has quite a good reputation/customer service, but this looks to be a new model and is currently unrated on Amazon.
Power will obviously be shared between the four ports as more devices are plugged in. I expect the charger will briefly cut power to redistribute load as each new device is plugged in.
The 100W 3 port (2xUSB-C, 1xUSB-A) is also available for around the same price if you want a smaller charger or still have legacy USB-A devices.
Model: ZY-WC-100W-4C
Power Output: 100W Max
Input:100-240V ~ 50/60Hz 1.5A
Output USB-C1/C2: 5V3A, 9V3A, 12V3A, 15V3A, 20V5A (100W Max)
Output USB-C2/C3: 5V35V3A, 9V3A, 12V3A, 15V3A, 20V2.5A (50W Max)
C1 + C2: 65W/35W + 35W/65W
C1/C2 + C3/C4: 65W/65W + 35W/35W
C3 + C4: 35W + 35W
C1/C2 + C3 + C4: 65W/65W + 20W + 20W
C1 + C2 + C3/C4: 30W + 30W + 20W/20W
C1 + C2 + C3 + C4: 30W + 30W + 20W + 20W
Material: PC (UL94-V0 Flame Retardant)
Dimension: L69W68.5H30mm
Weight: 224 grams
Fast Charging Protocols: PD3.0, PD2.0, QC4+, QC3.0, PPS, Apple 2.4A, AFC, FCP, SCP, BC1.2
Will this suit a Japan plug? Are US and JPN the same?