Both are good Japanese movies to watch.
Mystery, murder, action, psychology, thriller
Love both main male lead.

Both are somewhat mysterious devilish or angel, it is up to your interpretation.
Fun movies to watch if you are into thriller, murder mystery, action movies.

Both are crime, murder, mystery time travel Films
Both are male lead focus.
Both are intense thriller.
Will their mission be succeeded? Can they change the future?

Both has a male lead that is mysteriously able to travel.
One is a medical mystery, the other one is crime murder mystery
Both male lead did a good job of leading the mystery story.
Will they able to twist thing up, prevent the evil events from happen?

Both involved male lead attempted to correct the past.
Will he be able to change the future?
Does he has the power or ability to amend the future event?

Both film involved a male lead that was dead or half dead but the spirit still around.
He trying to use the younger man to help him achieved the unfinished business.
Will the young man eventually aware of what was going on.
Is it possible for the ghost to fulfill his wish?

Both involved male lead went back in time to change things, rearranged things, fix things,
All in all to prevent something bad from happening in future. Will their mission be success?

Both are good Japanese film to watch. They both involve male lead travel to the past to fix something. Both has some romance. Fun watch. Love both male leads. Worth watching.

Both involved male leads went back in time to fix the event that will happen in future.
Can they prevent an event from happening?
Will they able to fix things up? Will they be in danger?
Fun, interesting , plot twist, good watch

Both films involved male lead travel to the past to prevent something to happen, to fix things, for the love one. Can they accomplished their mission? Can they fix and change the future?

Both involved male leads time travel to save the love one.
Story gets intense, mysterious, plot twist.
Showing human being struggle to be on both good and evil side.

The male lead was able to travel back and forth to get things fix.
He have had some regret, unfinished business in previous life
Can he get things done? Can he achieved his wish? Can others help his spirit in any other way?