"I caught a cold that grew into something more and now I'm in the hospital. I'm feeling much better. I think I'll be able to drop by the studios soon."
And Sachio finally appears to be coming to terms with letting the media in on the secret of her husband's hospitalization and told reporters that he would be back home within 4-5 days. Although she did also say she had nothing to add with regards to her husband's hospitalization.
Incidentally, there was a program on TV the other day (Akko-ni omakase!, アッコにおまかせ！) that mentioned Nomura's workload leading up to his hospitalization and it was pretty crazy. I can't remember the exact numbers, but there were weeks where he was giving speeches 4-5 times a week. That's a lot of a 74-year-old.
Perhaps this is why Sachio didn't want to admit her husband's hospitalization. Since she's in charge of his schedule, maybe she felt bad about his hard schedule?