If you wish to change amperage at the time you switch to Ambit Energy Japan, you can do so by contacting our Customer Care Center after you enroll. If you are already enrolled with Ambit Energy Japan, contact our Customer Care Center and we can check if amperage change is possible. However, please note that depending on your contract status, there may be installation costs, or we may not be able to process your request if your last amperage change was made recently.