Question about lives in Japan

[tsumekaze_]

Hello everyone!
I have been inactive on here for quite some time, but maybe someone still remembers me!
I plan to finally go to Japan for the first time this year. I want to go on October and stay in Tokyo for six months (until March/April), and I was wondering if I would be able to catch some lives there. If I list the artists whose concerts I'd love to attend, would anyone be so kind as to tell me whether they are holding lives in that period? I only know about ayu's CDL (but I would love to go to this year's Hall tour instead, only I don't know if she's doing any dates in that period?)

- ayumi hamasaki
- koda kumi
- ai otsuka
- maybe namie?

if u know about any other live in this period please do tell. I'm a fan of many but obviously cannot spend all my money on lives, these are the ones I am most interested in.

I could also go from April to September. In that case I'd be able to catch A-nation, which I'd love. What period do you recommend? (also for living in Japan, which one is the best? winter/spring or spring/summer?)

Sorry for ranting so much! Thank you!!