Japan's health ministry is to allow police and firefighters to give antidote injections on the spot to people hit by chemical terrorism.
Japan's law in principle allows only doctors and nurses to administer injections.
A ministry advisory council on Thursday approved the proposed change to allow swift response to save lives in the event of a chemical attack.
The step is part of efforts to prepare for terrorist attacks involving chemicals such as nerve agents during the 2020 Tokyo Olympics and Paralympics.
Police and other rescue personnel will be allowed to use only automatic one-push syringes, which can be used to give shots through clothing.
The personnel are to be allowed to use antidote injections when a chemical attack is highly suspected, for example if three or more people at the scene cannot move.
The syringes are to be used only by personnel trained in using them.
The ministry plans to inform police and fire departments of the decision and organize training sessions.