The Justice Ministry will toughen its immigration procedures by using past data to profile people who would be likely to stay on illegally in Japan, according to ministry officials.

In particular, the ministry is keen to bolster scrutiny of arrivals on short-stay visas, given that screening of this category of visitor has been less rigorous than for those who hold student visas, even though short-stay visa-holders are a greater source of illegal residents, the officials said.

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