Generally PE exams are offered also in April and October. However, the PE exams of some disciplines are offered only once a year, in either April or October. PE exams. Details of the application procedures and qualification/eligibility of the applicants are shown below, and only those people who reside in Japan are eligible to take the Exams.
For more details, please access to the following links.
PE Chemical exam;http://ncees.org/engineering/pe/chemical/
PE Nuclear exam;https://ncees.org/engineering/pe/nuclear/
Fire Protection exam;https://ncees.org/engineering/pe/fire-protection/
Industrial and Systems exam;https://ncees.org/engineering/pe/industrial-systems/