Bought already...my current itinerary below

Day 1: Arrival at Narita Airport
• Morning  afternoon : Meiji Shrine, Harajuku
• Evening  night : Shibuya area: Shibuya-crossing, Hachiko statue

Day 2: Tokyo  Kyoto (Day 1 of JR Pass)
Assuming depart at 8, reach Kyoto at 10 am.
• Morning  afternoon: Kyoto Station’s Ramen Street, Fushimi Inari
• Afternoon: Nishiki Market
• Evening  night:

Day 3: Kyoto (Day 2 of JR Pass)
• Morning  Afternoon : Arashiyama District – Senryuji temple (Yukata), Tenryuji temple, bamboo groves, Nonomiya Shrine
• Afternoon: Kinkaku-ji (Closes at 5 pm)

Day 4: Kyoto (Day 3 of JR Pass)
• Morning  afternoon: Hanamikoji Dori (Kimono, Geisha), Gion, Kiyomizu-Dera (like JiuFen)
• Others: Ginkakuji
• Can consider going to Osaka

Day 5: Osaka (Day 4 of JR Pass)
• Morning: Osaka Castle (optional)
• Afternoon  night: Shinsaibashi, Dotonbori  Nipponbashi  Namba (Don Quijote, Donqi)
• Others: Shinsaibashi (Shopping), HEP Five mall, Ferris Wheel (near Umeda Sky Building), Pokémon Centre

Day 6: Osaka (Day 5 of JR Pass)
Whole day: Universal Studios

Day 7: Osaka  Nara (Day 6 of JR Pass)
• Take Kitetsu line from Osaka
• Morning  afternoon: Nara
• Afternoon  night: see Others (Day 5)

Day 8: Osaka (Day 7 of JR Pass)
• Morning: Kuromon market
• Afternoon: See Others (Day 5)
• Afternoon  Night: Train back to Tokyo

Day 9: Tokyo – Ikebukuro
• Lumine, Seibu, Tobu, Animate, Sunshine City, Pokémon Centre, TOKYU Hands, Donqi, Matsumoto Kiyoshi, UNIQLO, NAMJA Town & J-World

Day 10: Tokyo – Shibuya and Shinjuku (can play around with itinerary: Shibuya, Shinjuku, Harajuku)
• Morning: Shinjuku Area – Shinjuku Gyoen, shopping @ Lumine Est., NewoMan, Keio Departmental Store
• Afternoon: Harajuku Area (To do: Visit Kiddy Land (Sanrio), Calbee Plus, cheap accessories at WEGO)
• Evening  night: Shibuya (Shopping, Café) – Shibuya 109

Day 11: Tokyo
• Morning: Asakusa Area – Kaminarimon Gate, Sensoji, Nakamise shopping street, Suzukien x Nanaya Level 7 Matcha Ice Cream
• Afternoon: Tokyo Sky Tree (may see Fuji in the distance), Tokyo Salamanchi
• Evening: Ameyoko Shopping Street Ueno (Minatoya Takoyaki, Niki no Kashi Candy Store), Akihabara (Electric Town)

Day 12: Tokyo  Malaysia

don't forget proper winter boots/shoes

If there is no snow, just winter.. water proof shoe will do too, such as those hiking shoe.

Or like myself, invest on winter gear.. and you will make sure that you have plenty of winter holidays ahead. And take the opportunity to style yourself up, the way that you can't wear in Malaysia.

But.. but but.. if you have sweaty feet.. don't wear those rubber water proof boots (something like those fishing boot.. but now plenty of stylish 1 that make for winter). I have tried that in my last trip to Kyoto... guess what? My feet flooded with water!!! (my sweat!)

For budget wise, can just buy those online winter boot.. and after your trip...if it still looks good.. can keep for next use.

It will be awesome. Winter has its own charm. In fact, it'll be a lot of fun to celebrate New Year in Japan. While there's no fireworks, you get to see something different in comparison to the norm (in Malaysia). And 2nd January is Lucky Bag (fukubukuro) day where you get to shop to your heart's content. If shopping is not your thing, only on 2nd January, you can join the crowd in Imperial Palace (where certain parts of the palace is forbidden to go in during other days) and take a peek at the Royal Family as they greet the crowd.
Depends on whether it's going to snow. Higher chance in February but it's not heavy snowfall; just a bit here and there making the floors wet (slippery) rather than cumulative snow. If you're there and it happens to snow, just grab a pair of boots in Tokyo.
Maaan unless you've got a lot of luggage space! Otherwise just 1 winter jacket will do they're so bulky (even after vacuumed them in the bag) and takes up a lot of space. Stylist or not... everyone (most of them!) is wrapped up like ketupat (or bakchang) due to the cold

Hi, i have a question about Kansai Thru Pass and JR Kansai Hiroshima pass.

- Can the Jr Kansai Hiroshima pass be used on local buses at Himeji and Amanohashidate?

- Can the Kansai Thru pass be used on local buses in Kyoto and Nara?

I have checked the eligibility for both buses and  Jr Kansai Hiroshima pass said they cover all JR buses, and gave a link in Japanese for the stops included. (I can't read japanese)

While for Kansai Thru Pass, it mentions coverage KYOTO BUS and KYOTO KEIHAN BUS, i don't know if that's all the buses that generally we will need to move around Kyoto attractions. Also, Nara buses are not listed, or is it listed under Kyoto Buses?

It's well conditioned inside the building. Neither very hot or cold.

piece of advice...better be prepared than be sorry

you won't wanna fall sick on the first day of your trip

I would say depends on individual, some can stand cold, some in KL also wear jacket and walk under the sun.

But my advise is bring a sweater/fleece/turtle-neck in your backpack. Get a medium size ziplock bag from Daiso to squeeze out all the air.

Worst case scenario, your luggage is missing/delayed. Imagine if you can withstand the temperature to go from airport to hotel and go out for meals/shopping. e.g. queue at bus/taxi stand, walk from station to hotel, etc.

You'll be fine inside the building, as for when you leave the building, it will depend on the weather at the time. Best to prepare a jacket (or even Heat tech to change into) for the time when you leave the building.