Click here for the general info of the strategy stage: https://youtu.be/fPTlxm0Vjz0
You beat this stage with either at least: 1) 2 Todomatsus, 2) 2 Ichimatsus or 3) BOTH 1) and 2). The latter option is easier and faster, and if you have everybody from the Band (White Day) set, you can use all 6 of them to beat this stage.
If you have Todomatsu from either White Day, School of Rock, Interrupted Night, Feat Matsuzo or Akatsuka Rocket set, and you also have Todomatsu from the Band (White Day) set, you will beat this stage around 4 minutes or less. But if you have Ichimatsu instead, this is where you follow this strategy. Ichimatsu is known to be very slow in this game, but you can beat this game in less than 9 minutes with 3 of him on your team.
You need a good balance of ground and anti-air units on your team, so you need Ichimatsu, Jyushimatsu and Todomatsu from the Band set and then all 6 of your Matsus from either White Day, School of Rock, Interrupted Night, Feat Matsuzo or Akatsuka Rocket set on your team. Equip buildings that boost the strength of Todomatsu (https://youtu.be/VCteu6plbh0) and Ichimatsu (https://youtu.be/S3eTRdy6m70), and the attack power of the anti-air units.
This is the strategy that does the work for you. Not only you turn theNEET auto on but you also turn on the auto-mode as well. And not only you check off the auto NEET cannon, AP MAX and HP&AK boosts up boxes but the double speed box as well, since you have 3 Ichimatsus on your team. Tap on the big pink button and watch your units attack the enemies. You’ll eventually see an Ichimatsu wall at the end, which is what you really want to see attacking the enemy base.