Hey, wanted to give you a little update and insight on the situation;
Swisscom has their own limitations with every 'user' of data-roaming and therefore some may find their monthly cap set at 100CHF, without having the options shown to go above.
However, with a short call through the customer service line I was able to ask to increase my monthly spending cap.
Thank you again for your help, now I can travel flawlessly through Japan in my remaining time.