Most car rental companies in Sendai require a credit card for renting a car. This is because they use the credit card to hold a security deposit and cover any additional charges, such as fuel or damage fees. However, there may be a few companies that accept debit cards or cash deposits, but they are not as common.

When renting a car in Sendai, you will typically need to present the following documents:

• A valid driver's license from your home country or an International Driving Permit (IDP).
• A valid passport or identification card.
• A credit card in the name of the primary driver for the security deposit.

It's always a good idea to check with the specific car rental company for their exact requirements, as they may have additional documentation needs.

The cancellation policy for car rentals in Sendai can vary depending on the car rental company. It's important to read and understand the terms and conditions of your rental agreement before making a reservation. Some companies may offer free cancellations or allow cancellations up to a certain number of days before the rental start date, while others may charge a cancellation fee or have stricter cancellation policies.

Yes, it is usually possible to add an additional driver to your rental car in Sendai. However, there may be an additional fee for adding another driver, and they will need to meet the same age and documentation requirements as the primary driver. It's best to inform the car rental company in advance if you plan to have an additional driver, as they may need to provide their information and sign additional rental agreements.

If you return the rental car late in Sendai, you may be charged additional fees. Most car rental companies have a grace period of around 30 minutes to an hour, but if you exceed that time, you may be charged for an extra day or charged an hourly late fee. It's important to check the terms and conditions of your rental agreement for the specific late return policy of the company you are renting from.

Yes, it is usually possible to pick up the rental car in one location and return it in another location in Sendai. This is called a one-way rental and may incur an additional fee. However, not all car rental companies offer this service, so it's important to check with the specific company or booking platform to see if one-way rentals are available and if there are any additional fees involved.