Sorry can't help, not in my knowledge range.

Got any good recommendation for the service apartment? I saw oakhouse reviews quite good.
Just searched it but for my date only got 2 hotels which are located in Kanagawa but the price also almost the same as the one that i booked 

Kanagawa? I thought you are going to Tokyo. Not familiar with hotel price in Kanagawa

I receive this note from a friend. Old japan note. Is this note still useable in japan now? Going to osaka on march

Tis is not old note, it is still present note being used in Japan

Are you sure? Because went to 2 money exchange both dunwant to accept because its old note.
Its well preserve because its packed in plastic for years..

This series were issued in 1984 and is still accepted as legal tender. If money changer refuse to accept, maybe you need to look closely if it's fake currency (photostat)

Hi everyone,

Upcoming Japan trip to Osaka - Kyoto on 2nd Feb ~ 9th Feb. Can anyone recommend how thick winter cloth should I prepare? Like will it snow in Kyoto?

Checked the weather forecast, roughly 10c on average.

Are you sure? Because went to 2 money exchange both dunwant to accept because its old note.
Its well preserve because its packed in plastic for years..

Traveling from Tokyo to Fukuoka by shinkansen using the JR pass, maybe stopping by Hiroshima to have a look see (1-2 day?). Either Hiroshima or Kumamoto.
Total 5 days for this side trip, then last day will probably fly back to Tokyo since its quicker.
Will the trip be too rush? 2 person with 2 large luggage.

You cannot Board JR Limited Express or Shinkansen directly just with JR Rail Pass !!!  Any Time you want to take Limited Express or Shinkansen must go JR Ticket Office first. Show the JR Rail Pass to Staff & tell staff which train & which seat (Reserved or Unreserved) you want.  It will Print out The Seat Ticket (Reserved or Unreserved also got Ticket with that Particular Train no.) 
So before you pass that Manual Gate, you need to show 2 Ticket (JR Rail Pass + Seat Ticket).
Without 2 ticket, you can't even pass Manual gate of Shinkansen, staff will ask you go get seat ticket.

Local / Rapid train such as JR Yamanote Line / Chuo Line etc etc.....This kind of train, you can direct pass manual gate by showing JR Rail Pass. This part really interesting, Because Limited Express sharing same platfrom as Local train.
Staff will let you pass because he think you just wanted to take Local train.  If you board Limited Express without Seat Ticket, Ticket Conductor will FXXX you HARD & Give you long long lectured 
I see this incident many many many times     

About the Stamp on JR Rail Pass only stamp once per day. After 24 hours, next passing manual gate, staff only stamp 2nd chop.

Hi bro, dumb question… Shin-Osaka to Kyoto is 15 min via Shinkansenusing JR pass, so need to reserve seat? Then if want to proceed to Saga Arashiyama from Kyoto station using JR pass also but no need seat reservation?

planning to go japan in march.. only 2 shot pfizer no booster.. is it only need PCR test 72 hrs before to enter Japan? No need apply visa already also right?

planning to go japan in march.. only 2 shot pfizer no booster.. is it only need PCR test 72 hrs before to enter Japan? No need apply visa already also right?

No need Visa. If you don't have booster, you need PCR test with 72 hrs + very very very very long Q because you don't have fast track QR Code.

Disembark aircraft > Quarantine Section [Japan Health Department] > Immigration Section > Collect Luggage > Custom Section > Airport Lobby
If you don't have fast track, you will be stuck at Quarantine section for hours and hours.
Japan currently having 8th wave of Covid surge, daily 100k++ cases. Quarantine Section will be very strict at the moment. 

Best is you take a booster shot and download fast track QR Code

kid under 6 don't have vaccine, and don't have PCR test still need long Q ??
parents have 3 shots

You only got 5 days at Japan or 1 week for Fukuoka + extra 5 days for side Trip ? 

If got 5 extra days doing side Trip then:
Side Trip 1 day at Kumamoto
Side Trip 1 Day at Beppu
Side Trip 2 day 1 night at Nagasaki