Welcome to the forum!
The label photo shows IHI-Shibaura. This combination shows to have began in the 1950’s. In a quick search I did not find when a name change happened again but did find reference to projects with Ford (later New Holland) and also with Yanmar for the AF series of tractors.
Can you get a number off of your oil filter and cross reference it.
Air filter can probably be matched either by cross reference or careful measurements to length and diameter.
In an external hydraulic filter-cross reference is probably best route. Not all models have an external hydraulic filter and even most imports have a cleanable suction screen that is removable and reusable. A huge caution these screens are located low in the hydraulic reservoir so expect a huge fluid dump if not drained first. Follow the suction hose(s) from the pump, the cover plate will be opposite the suction hose on the differential.
I am sure there is info out there, but if a limited gray brought to the US, it may be difficult to locate.