Were hospital attacks in Osaka linked to a supply chain attack on lunch service by “Phobos?”

Asahi Shimbun reports (machine translation):

The social medical corporation “Seichoukai” (Naka Ward, Sakai City), which operates general hospitals in Osaka Prefecture, announced on the 7th that it had been damaged by a cyber attack caused by ransomware. School lunch delivery services that deliver meals to affiliated hospitals are said to be affected. This school lunch service was also attacked by a cyberattack, and some medical services have been suspended since October 31. Osaka Acute and General Medical Center (Sumiyoshi Ward, Osaka City) are also using. According to officials, both attacks are believed to have been carried out by the cybercriminal group Phobos.