i'm going to kyoto + osaka + nara literally next month today
yes, i also saw the night temperature is like genting
but i'm bringing myself wind breaker only

inner layer, that is for like early january...oct is still autumn not winter

windy = this part is very unpredictable
it was super windy the last time i was at tokyo which makes it super duper cold

it was early january
but that time even the temperature is unpredictable

weather forecast say 10-7c, the day before departure i check live weather...also around the range
but when i arrive, it was 3c
and it was 3c all the way until my 2nd last day, thn it got warm back for 1 day before i leave

If you don't like to carry so much clothes and wear so many layers of clothing, HeatTech is your answer. 

yes
it was winter and i did bring my winter jacket
but i was under-prepared due to the sudden temp drop and wind
i forgot to bring glove and face mask
my hands are being blown by the wind until whitish and stiff
my face is being blown by the wind until my lips dried and cracked....my cheek also have peeling because so dry

only my body part is well insulated

Just want to offer my 2 yen. I was in Kyoto-Osaka in October last year and I noticed the forecast temperatures this year is similar. From my experience, the early morning and night time can feel a bit chilly for some people when temperatures drop to 10+ C. But in the afternoon it can get very warm - don't let the 20+ C temperatures fool you. I would say a sweater or light jacket is sufficient. If you love cold weather like me, you can actually do without one even. 

Between a 1hour 50 mins flight vs a shinkansen + train ride + transfer time for 6-7 hours+-, I will stick with the flight thank you.
Use google translator should be the safest. 
Nolar... You definitely don't need HeatTech in autumm. Just a light jacket in your bagpack would be enough. If you are in the city, it wouldn't be that cold compared to the outskirts.

My 2 cents, a windbreaker is better than anything else. Sometimes, its mentioned 10+C for the temps, but with wind, it can go wayyyyy lower than that. Worse come to worst, just go to Daiso and get few heat packs for your hand and few masks for your face to retain moisture.

I'd say everyone's cold tolerance is very subjective. It tends to rain during autumn and the temp gets crazy cold during that time or afterwards. Or night time. So if you already have heat tech, just bring along. Judge for yourself then decide whether you'll want to wear the heat tec or not

They're outskirt, correct, but still major tourist attraction. Nikko is pretty quiet except when you're at the shrine.

Since you're going Nikko, I highly, highly recommend dinner at Hippari Dako the tsukune (chicken meatball) and yakitori is sooo good. One of the best I've ever had. Also, Nikko is famous for yuba (beancurd) so you'll see yuba dishes everywhere.

Hippari Dako:
https://www.tripadvisor.com.my/Restaurant_R...ture_Kanto.html

Thats right, not going to take up much (if any) space at all better be ready. For autumn i usually go about with a heat tech inside, and a hoodie on the outside. It was sufficient. Winter is different story haha.

Ahhhhhh i'm not sure if its Halal. Btw for Nikko i saw this for
Halal : https://www.instagram.com/p/B19BXdTAwu7/?igshid=4fexg1xa72ca

Why not use SIM card and put in your phone instead?

just get 3

Tokyo is big and its easy for you to lose your friends so having internet will be super easy if one of you are lost

Some scenarios can happen eg:

Imagine one of your friend did not manage to get out of train in time and stuck in the train lol and 2 of you are out

or one of you are busy at the hentai section at your popular book store but two of your friend already go to the next building/floor

Cheaper by how much?

Just another option: Hello1010 Japan 15 days 6GB sim card for RM75

I don't know if things changed that much since 2 years ago

Apparently I have a hard time finding free wifi spot back then

Unless you insist the whole group must go around together, better to get pocket wifi. My last trip I got local sim card in my phone but it was difficult to manage when I have to pass it to others because they needed the line more than I do. A pocket wifi can be easily passed among ur group. Either that or if you have spare unused phone, can bring it along as a wifi hotspot with a local sim.

Fresh fruit and vegetable are ban, not only Malaysia, whole world also same.

Hiroshima, Okayama, Himeji, Osaka, Kyoto, Kobe, Nara, Nagoya, Tokyo, Gunma

WiFi easy to find but finding one without registering etc. is a pain in the butt

Ended up just getting wiyo for everyone because rm11 per day

Some like in Australia are very strict at bringing fresh produce into their country as it could bring in pests. They don't even allow ba'kua in!

can use the attached website
http://search.w-nexco.co.jp/
im also planning to drive from tokyo to lake kawaguchi and stop by tachikawa showa kinen park, distance is around the same as ur destination and toll fees shown is around 3000yen