The process of becoming full-scale or proceeding at full tilt; moving from preparation to actual full operation (often occurs with する).
春になり観光シーズンが本格化してきた。
With spring, the tourist season has come into full swing.
工事は来月から本格化する予定だ。
Construction is scheduled to get into full swing from next month.
コロナ対策が本格化する中で、新しいルールが導入された。
As COVID measures were being intensified, new rules were introduced.