JR Hokkaido website has updated the train information as follows;

From 19 March, the following service will be resumed;

Hakodate-Shin Aomori
Hakodate 7:24 -> Shin Aomori  ~Super “Hakucho” #20
Hakodate 10:17 -> Shin Aomori ~Super “Hakucho” #26
Hakodate 12:04 -> Shin Aomori ~Super “Hakucho” #30
Hakodate 13:56 -> Shin Aomori ~Super “Hakucho” #34
Hakodate 17:07 -> Shin Aomori ~Super “Hakucho” #42 (except between Aomori and Shin Aomori)

Shin Aomori 9:13 -> Hakodate ~Super “Hakucho” #95
Shin Aomori 10:16 -> Hakodate ~Super “Hakucho” #11
Shin Aomori 13:03 -> Hakodate ~Super “Hakucho” #19
Shin Aomori 15:38 -> Hakodate ~Super “Hakucho” #25
Shin Aomori 16:41 -> Hakodate ~Super “Hakucho” #27

Sapporo 22:00 -> Aomori ~”Hamanasu”
Aomori 22:42 -> Sapporo ~”Hamanasu”

The following information is about cancellation of the service.

*Cancelled till 24 March (the train schedule after 25 March will be advised )
Sapporo 17:12 -> Ueno ~”Hokutosei”(express sleeper)
Ueno 19:03 -> Sapporo ~”Hokutosei”
Sapporo 16:12 -> Ueno ~”Cassiopeia” (express sleeper)
Ueno 19:03 -> Sapporo ~”Cassiopeia”
Sapporo 14:05 -> Osaka ~”Twilight Express” (express sleeper)
Osaka 11:50 -> Sapporo ~ “Twilight Express”

Hakodate area (Hakodate Line and Esashi Line) has continued to limit the service for a time being.

*Cancelled (Hakodate Line) Sapporo-Hakodate
Sapporo 7:30 -> Hakodate ~”Hokuto”#4
Sapporo 12:22 -> Hakodate ~Super “Hokuto”#12
Sapporo 16:52 -> Hakodate ~Super “Hokuto”#18
Hakodate 8:30 -> Sapporo ~Super “Hokuto”#3
Hakodate 12:30 -> Sapporo ~Super”Hokuto”#9
Hakodate 17:11 -> Sapporo ~Super”Hokuto” #17

Please refrain from travelling unless life threatening.
If you do, please check the service and  best wishes for the safe trip!