Yatto mireta tteba-Yo!! やっと見れたってばよ!!
(I was able to see at last!)
That number means just entering number not seat number.
立見/tatimi means "standing" no seat area.
アリーナ後方/arena kouhou means "behind of arena". (correct!)
Step 1)
From early time staff making "待機列 taiki-retu/waiting line" in order
about 30-50 audience each until open time/開場時間 kaijou-jikan.
Find your number belonging board first.
http://image01w.seesaawiki.jp/s/s/simokitabrothers/0b4658f635c6e77b.jp...https://pbs.twimg.com/media/BxZToVUCAAA_HZt.jpgOops, event space[イベントホール/event hall] location is here.
https://www.m-messe.co.jp/en/facility/https://goo.gl/maps/n3F811N8PX922)
Entering start from 1st number's block wait until "Pls go forward" voice.
Pls don't run and passing others.
3)
Ticket and secure check like airport.
Open bag/luggage in advance until your turn if you have.
http://livedoor.blogimg.jp/n-46682144/imgs/e/5/e5328d5c.jpghttps://live-public-img.s3.amazonaws.com/wp/wp-content/uploads/2014/07...(cannot bring camera/video/voice recorder and other illegal items)
If couldn't find コインロッカー/coin locker(strage) in advance use cloak service after secure check.
(Don't lost your luggage number's recipt or small plate)
(Web no mentioned about cloak service is free or not)
So don't bring waste luggage and items.
4)
Entering to arena/アリーナ(lower floor).
Wait until start time/開演時間 kaien-jikan.
(you cannot enter other blocks and re-entering)
(you can go toilet until start no worry but don't too much drink before)
Basically no special or strange rules
but if still wondering ask staff ASAP on the day
or by call to event management office (TEL)03-5793-8878.
Have fun!