TOKYO — The 3,600 people aboard the Diamond Princess, locked down for more than a week and desperate for information, have been reduced to peering out windows as hazmat-suited workers take away the newest coronavirus patients and mysterious buses, their interiors shrouded by curtains, come and go from the port.

They have Wi-Fi, but it is spotty, and even if it were not, they might search in vain for information about their plight from tight-lipped Japanese authorities.

Experts in crisis management said the government was offering a textbook example of how not to handle a public health crisis.

“Repeatedly explain what is known, and what is unknown, and when people can get more information about what remains unknown,” said Dr. Hana Hayashi, a public health strategist at McCann Healthcare Worldwide Japan. “It sounds very simple, but by continuing to do this, people’s concerns will be reduced.”