Hi Zaxxon,
Congrads and don't be embarrassed. Tough to read Japanese.
Here is the answer I think Allstone Huang (BJ74 owner, Coastal Cruisers member, and all around fine individual) gave me when I asked the same question (if it wasn't Allstone, I apologize):
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shift auto into neutral, t-case into nuetral, engage the PTO. then select a gear (or reverse) to operate the winch. no forward or reverse on the PTO lever. can also engage your t-case to get the tires to "help out" the winch. have to get used to this as it is difficult (or can be) as engine speed and winch/tire speed are all conected.
I replaced my shear pin with a 1/4" roll pin. It took about 2 mininutes with a punch and a drill. I then went and buggered something up in the actual PTO, not the winch itself
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The PTO shifter can be finicky to engage. If first you can't succeed, try again.
A couple of things I discovered:
1) I have owned a PTO (BJ74) and a Warn 8000lb electric (FJ40). I now realize that I prefer the electric, even if its not usfull for long periods beacsue of the load on the battery and charger. The reason is that the PTO does not let you feel how hard the winch is working. It just pulls with the worm gear, the diesel not changing RPMs at all. At least the electric winch whines and slows. Also, the electrics usually have a remote, far safer and lets you view your pull from outside the vehicle, stopping the pull if you see a problem.
2) Watch out for your winch angle off dead centre. I pulled from off centre by about 40 degrees (not a problem with a proper fair lead) and the cable cut into my stainless bumper fascia (the fair lead rollers are inside the fascia) and snapped the cable with quite a whiplash. Luckily away from the vehicle.
Ahhhh. We live and learn.

Cheers,
Bruce
A2B