Hello, can I possibly convert my NSCP-W61 from Japanese to English?

Question edited for clarity and better English.

You don't say what language you want to change to? I get the impression that English is not your your first language.

Here is the manual

https://toyota.jp/manual/navi/nscp-w62.pdf

It is only in Japanese. The Toyota Aqua is a Japanese Home Market Model, so the stereo is probably only in Japanese unless you can get a firmware update to where you live.

Toyota Aqua (Japanese: ???????, Hepburn: Toyota Akua) is a full hybrid electric subcompact/superminihatchback (B-segment) manufactured and marketed by Toyota since 2011. The nameplate is exclusive to the Japanese domestic market,

It is also the Toyota Prius in other countries, so the videos might help. There is also a trick to use a smartphone with the Google Translate app on it and use the camera feature to translate what you see onscreen. Look for Settings - Language.

You can download the Google translate app on your phone and you will see the words in english.

https://www.youtube.com/watch?v=gVyoa7kSBMA

Hello, maybe you can unplugging for 5 seconds then plug it and restart. If don't turn on you need call a technician and probably you need to replace the Latch and interface.

https://kinpdf.com/download/pdf-nscp-w61-user-manual-wordpresscom_59f440eed64ab233be2aadea_pdf

There doesn't appear to be a language option for menus, displays or set up.

It's easy, please read an follow these steps: https://rent.toyota.co.jp/eng/service/navi.html

It is possible to do this, although it is not easy. It requires reprogramming the HMI in the unit. I have done this on my AVN6606HD for the majority of the functions I use and it would probably apply to other units to convert from japanese to english.