Maybe it will be informative if you can explain what problem stopping you from saving estimate. Pricing tool saves estimate by clicking the Share button which will generate a unique link to your estimation. There are a lot of information there to give the most accurate context about your estimation. If you can share what information exactly you need, it will be helpful to point you to the right info/tools.
In Japan, volunteers have created and released the following sites. 
 Roughly AWS - Roughly AWS charges in Japanese Yen
The above is Japanese and can only be calculated in Japanese Yen, but if you do machine translation or currency conversion, you can use it as a reference.
I'm glad if you can use it as a reference.
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