=Footwear=
If you have a favorite pair of comfortable walking boot stick with them. Modern light weight boots have revolutionized hill walking for the beginner. No longer is it necessary to spend months breaking a boot in indeed many need hardly any treatment at all. Fabric upper boots, although generally less durable or waterproof than leather boots are ideal for normal trekking where you encounter little rain. They also have the added advantage of allowing the foot to breathe.
Vibram style soles are a definite advantage especially on muddy or rough trails where they provide a good grip and cushion the foot. Those intending to climb will probably be familiar with light weight plastic mountain boots which have all but replaced leather boots and know how uncomfortable they are for normal trekking.
Many light weight boot too flexible to take a crampon. A specialist retailer should be able to advise you on the most suitable boot once he knows plans.
=Backpacking Packs=
You do Still see a number of independent trekkers carrying traditional metal pack frame suitable for heavier loads. But modern internal frame packs are probably more comfortable and certainly more stable. If you are not intending to carry a heavy load, you should opt for the Alpine style pack with a simple internal frame perferably with a hip belt.
Many trekkers on commercial treks carry sacks that are too small and inevitably end up with half the things. They need tied to the outside, looking like tinkers. A backpaking packs with a lid pocker and perhaps a couple of small outside pockets is useful for quick access to water bottle, maps and others.
=Layering Systems=
In a country like Japan, where altitudes on trek vary tremendously, and the day and night temperatures alternate between the extremes and where there is the possibility of sudden changes in the weather a clothing system that is highly functional and adaptable to conditions is essential.
A system of clothing based on several light, warm layers, rather than a single bulky sweater over a wool shirts or fleece jacket is ideal. Fleece or tracksuit style bottoms are perfect on cold days and around hut in the evening and when combined with a shell layer, they become adaptable to any conditions, never too hot and hopefully never too cold.
=Shell Clothing=
A windproof and waterproof shell is essential for all but the shortest and lowest treks. You may never take them out of your backpacking packs but should you get caught out in a sudden storm on an exposed ridge, they can prove a like saver. Even a moderate breeze on the top of peaks can be withering and a windproof layer will make it bearable and a perhaps even enjoyable.
Modern fabrics like Gore-Tex and others which are breathable are much more comfortable to wear than coated materials.
Check List
=Wear=
Jackets
Rain Wear
Outfit Wear (Fleece,Down parker and vest etc…)
Shirts (Long sleeved / T-Shirts)
Pants
Mid Layer
Under Wear(Long sleeved / T-Shirts)
Socks
Hats/Caps
Gloves
=Gear=
Backpacking Packs
Rain Cover
Footwear
Gaiters
Axe
Crampons(4-6point summer season)
Poles
Headlamps
Battery
Water Bottles
Camping Tents
Sleeping Bags
Sleeping Pads
Stoves
Cookwear
GPS
Maps
Sunglasses
=Others=
Passport
Medicine
Food
Radios