《遗留搜查4》是一部于2017年在日本产生的电影，属于日剧类型，由上川隆也、栗山千明、戸田恵子和永井大等演员出演，由兼﨑涼介和長谷川康导演执导。

故事主要围绕着主人公刑警糸村聪展开，他以解决案件、救赎受害者亲属心灵为目标，通过对案发现场的“遗留品”进行彻底搜查来解决疑难案件。

糸村聪是一名擅长利用案发现场“遗留物”寻找线索的优秀刑警。他调到京都府警搜查一课的特别搜查对策室工作，该团队专门负责处理疑难案件。在这里，糸村聪结识了新同事神崎莉绪、佐仓路花和雨宫宏，四人合作破解一个个复杂的案件。

特别搜查对策室是一个高效的精英团队，他们负责调查备受社会关注的大案要案。他们在解决疑案时展现出高超的专业技能和情报管理能力，有着“救火队员”的美誉。

在每个案件中，糸村聪和团队成员都会面临巨大的压力和挑战。他们必须绞尽脑汁，寻找每一个细微的线索，揭开真相，还原案件的全貌。而每一个案件背后都隐藏着令人意想不到的秘密和谜团，这让故事更加扣人心弦。

《遗留搜查4》不仅是一部紧张刺激的悬疑片，更是一部展现刑警们坚持追求真相、守护正义的故事。观众们将随着糸村聪和他的团队一起走入复杂的案件现场，感受犯罪与正义的较量，体会到他们不畏艰险、无私奉献的职业精神。

"Legacy Search 4" is a movie produced in Japan in 2017, belonging to the genre of Japanese dramas, directed by Takaya Kamikawa , Chiaki Kuriyama, Keiko Toda and Dai Nagai starred, and directed by Ryosuke Kanechi and Yasushi Hasegawa.

The story mainly revolves around the protagonist Satoshi Itomura, who solves cases, With the goal of redeeming the souls of the victims' relatives, difficult cases are solved by conducting a thorough search of the "remains" at the scene of the crime.

Itomura Satoshi is a man who is good at using the "leftovers" at the crime scene to find Excellent detective with clues. He was transferred to the Special Search Countermeasure Room of the First Search Section of the Kyoto Prefectural Police, which is responsible for handling difficult cases. Here, Satoshi Itomura met new colleagues Lio Kanzaki, Ruka Sakura and Hiroshi Amamiya, and the four worked together to solve complicated cases.

The special search countermeasure room is an efficient elite team, they are responsible for investigating Major cases of social concern. They have demonstrated superb professional skills and intelligence management capabilities in solving suspicious cases, and have the reputation of "firefighters".

In each case, Itomura and team members will face huge stress and challenge. They must rack their brains to find every tiny clue, uncover the truth, and restore the whole case. And there are unexpected secrets and mysteries hidden behind every case, which makes the story even more exciting.

"Legacy Search 4" is not only an exciting suspense film, but also It is a story that shows the criminal police who insist on pursuing the truth and defending justice. The audience will follow Satoshi Itomura and his team into the complex case scene, feel the contest between crime and justice, and experience their professionalism of fearlessness and selfless dedication.