When you are visiting Japan, don't get caught out on public transport by not having enough credit on your IC card, aka a contactless smart card. Take out the miruca and slide in your IC card to check how much you have left on the card. The miruca instantly displays the remaining credit and can also be used like a protective pass case, so you can store your smart card inside and still use it at vending machines, ticket gates, and so on. Just press the button on the miruca whenever you want to check your credit.
Always knowing your credit will save you embarrassing confusion at the ticket gates when the machine beeps at you because you don't have enough yen left to leave the station. This is a simple gadget but a very handy one, especially for travelers who want to avoid extra stress while enjoying a trip to Japan. It works with all major public transport IC cards, including the ubiquitous Suica and PASMO cards.
The miruca IC Card Credit Reader features: