China and Japan are in communication on the case, he added.
In a statement released on Wednesday, Shenzhen police said that a 44-year-old man surnamed Zhong had been taken into custody.
China upholds the rule of law and the Chinese government brooks no illegal or violent activities, Lin said, adding that relevant authorities will bring the criminal to justice in accordance with the law.
Lin emphasized that this was an isolated incident and similar cases could happen in any country, saying that he believes that it will not affect exchanges between China and Japan.
“China has always taken, and will continue to take, effective measures to ensure the safety of all foreign nationals in China.”
He said that China always welcomes people from all countries, including Japan, to visit, study, do business and live in China.