February 7, 2020 | 9:16pm

An American passenger on board the Diamond Princess — a massive cruise ship quarantined off the coast of Japan because of the coronavirus — has been tweeting food reviews with quippy messages.

Matthew Smith — one of the more than 2,666 passengers stuck in their cabins since Tuesday — has praised the Carnival Japan line, which he said has started “stepping up its game” since the quarantine began.

“Princess stepping up its game with food service on #DiamondPrincess,” Smith wrote. “Don’t believe the honeymooners who would rather be in an American hospital. You might have to drag me off the ship when the quarantine ends.”

The American newlyweds Milena Basso and Gaetano Cerullo told CNN that they don’t feel safe on the cruise ship and appealed to Donald Trump to save them.

Smith, though, says he’s loving the quarantine diet.

He’s getting hundreds of likes and retweets after sharing photos of his so-called “feasts,” including pasta gratin and beef stew, smoked salmon, assorted pastries and “new experiences” like Japanese yogurt with aloe vera.

“Not bad at all, despite tasting a little like yogurt mixed with suntan lotion,” Smith wrote about the yogurt.

He’s even given advice to his shipmates — including how to get extra coffee.

Smith also shared a photo of thermometers that the ship’s crew distributed to passengers.

However, some have found Smith’s insights as “misleading.”

“I find your commentary insensitive and misleading,” wrote Ashley Rhodes-Courter. “My parents are on the ship and do not share your seemingly charming experience.”

A British man, David Abel, has also been giving updates of life aboard the ship, saying that: “Literally every hour, something is changing.”

“Passengers in the small inside cabins have no window, there is no daylight, and no fresh air… but the captain has announced those passengers will be allowed access to open deck for exercise and fresh air,” he wrote on Facebook.

The number of confirmed coronavirus cases on the Diamond Princess has risen to 61, it was revealed Friday.