Police are looking for a 39-year-old Brooklyn woman and her infant son who have been missing for over a week.

Hazuki Matsushita and her 11-month-old son Isse were last seen leaving Matsushita's mother-in-law's house on Roosevelt Island around 3 p.m. on November 18th, authorities said.

"I can't sleep, I can't eat," the woman's husband, 43-year-old Carlos Salazar told NBC4 New York after he reported his wife missing. "I'm running around, I go to restaurants that we used to go to to look for her. I'm doing everything I can." Salazar told NBC4 that he had been arguing with his wife about how to raise their son, but he still expected his wife to return home after their fight.

Salazar told the Daily News that Matsushita took their child's passport and birth certificate, sparking fears that she has gone to her native Japan. He's reportedly been in contact with his wife's father, who he says has been no help.

According to the News, however, police sources said that Matsushita may have been trying to run away from Salazar, who was abusive. An NYPD spokesperson could not confirm to Gothamist whether this was the case.

The News reports that Salazar told police that Matsushita was staying at his mother's house instead of their Bay Ridge apartment because they had a fight. During the fight, he allegedly threatened Matsushita's life, threatened to slap and kill her, and threw a garbage bag at her.

Salazar and his mother reportedly filed two domestic incident reports on November 18th. The News says that one of the reports described how Matsushita moved in with his mother, and the ohter described how Matsushita didn't return home after she said she would.

"I feel like she was neglecting my son. She didn't take his needs into consideration," Salazar told the News. "It's when I feel she's neglecting our kid, that's when all our fights start. You eventually lose your temper. It doesn't matter who it is."

On the day before the flight, Salazar says he saw Isse crawling around unsupervised and a mirror almost fell on him. The couple argued the next day after Matsushita sprinkled insecticide around the house, which Salazar said he feared Isse would ingest.

As of Sunday, Matsushita and her son have been missing for nine days.

"I just need to know if my son is okay, if she's okay," Salazar said. "I offered her to come back here. I'll leave, pay the rent, whatever. Anything she needs to take care of him. But she vanished completely."

Anyone with information in regards to this incident is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782). The public can also submit their tips by logging onto the Crime Stoppers website or by texting their tips to 274637 (CRIMES) then entering TIP577.

NYC's 24 hour domestic violence hotline is 1-800-621-HOPE; more details here.