Can you bring a airsoft gun from Tokyo to Hong Kong?

According to the Hong Kong Customs website, airsoft toy guns are listed as "Strategic Commodities". The import or export of strategic commodities is controlled by the Hong Kong Trade and Industry Department.

A licence issued by the Trade and Industry Department is required for the import or export of strategic commodities, including airsoft toy guns. The general policy of the Hong Kong government is that a licence should only be issued for the import or export of airsoft toy guns if there are good and sufficient reasons to do so.

As such, it is generally not advisable to bring an airsoft toy gun from Tokyo to Hong Kong without a licence. If you are planning to do so, you should first contact the Hong Kong Trade and Industry Department to make enquiries about the relevant requirements and procedures.