do ask at acc shop sure they have many type of converter.

1. converter with control panel, they sent wireless signal to your radio to transmit the audio via static frequency. (the concept is the same with cig lighter MP3 player).
- sample picture: http://sgwangacc.com.my/image/cache/catalo...acc-500x500.jpg

2. in-line antenna converter/booster. u can get malaysian radio channel, only the frequency shows the different number e.g 95.8 for flyFM in KL area, but ur radio may show 88.0 instead and so on for all radio channel (this because japanese radio channel only show from 76 to 95mhz only). They are many type and design also.
- sample picture: http://img.dxcdn.com/productimages/sku_223986_1.jpg

its up to you then which one u prefer..