A Honolulu family is offering a $10,000 reward for information leading to the safe return of a 70-year-old man with Alzheimer’s disease who went missing six weeks ago.

Chang Ho Han was last seen on a security camera leaving his home at 1133 Waimanu St., makai of the Blaisdell Center, at 6:50 p.m. Jan. 31.

His daughter, Rachel Song, said Han was taking medication to treat his dementia. She also said her father, also known as Peter Han, no longer speaks much English.

"We miss my dad so much. We need to know what happened to him, " she said at a news conference Thursday near the home Han shared with his wife, Young Ae Han.

"We need for him to come home. We are asking for your help," Song said.

The family first appealed to the public several days after his disappearance, and said in the ensuring weeks relatives and friends conducted searches in several neighborhoods around Honolulu.

Song said she and her husband, using fliers, have taken their search to as far away as Waianae, Wahiawa and the North Shore, and that Korean churches have also assisted in the search.

Song said the family’s efforts have turned up no clues to Han’s whereabouts.

"No evidence no witnesses," she said.

Song said the family is again appealing to the public and offering the reward because they feel they’ve exhausted other avenues.

"We realize it’s beyond our abilities," she said. "We’ve been hoping he’d come home on his own, but it’s already six weeks. We decided to do something we’ve never done."

Song’s husband, Andrew, said Han, a former limousine driver, may seem like he doesn’t need help and can appear lucid in brief conversations.

"He’s a person with a lot of pride, and he doesn’t like to go around asking for help," Andrew Song said.

The family said Han has no fingernail on the middle finger of his right hand. He has white hair and is 5 feet 5 inches tall and about 165 pounds. He was last seen wearing a white baseball cap and red jacket, along with dark pants and black shoes.

Anyone with information should call Honolulu police at 911 or CrimeStoppers at 955-8300.