I got important news from the messe office.
They say 'HANNOVER MESSE 2020 will be postponed to 13 - 17 July'.
Please see this link for datailed information.
Now in japan the number of the infection of the COVID-19 is increasing, and schools are off and many events are cancelled. There will be large damage for the economic activity, not just for the shortage of the masks and sanitizer kits.
Under the situation that is becoming more serious by the worldwide infection of the COVID-19, this decision is reasonable and understandable.
I will prepare for the Messe in July.