In the face of the Coronavirus outbreak, to ensure player safety, from February 20th until the end of March, Konami is choosing to cancel events throughout Japan.

These include:

• Various Shop Duel Events (such as Ranking Duels, Adult Duel Tournaments, various Duelist Exchange Meetings)
• Yu-Gi-Oh! WORLD CHAMPIONSHIP 2020 National Qualifiers
• Yu-Gi-Oh! WORLD CHAMPIONSHIP 2020 RelatedEvents (such as Parent and Child Duelist Exchange Meetings)
• Yu-Gi-Oh! Duelist Exchange Meeting 2020
• Duelist Festivals
• Konami Card Game Station Satellite Shop Related Events
• Area Events (Duelist Exchange Meetings, Female Duelist Meetings, Yu-Gi-Oh! OCG Duel Clun, Vs Staff Events)

Source