Except for in Japan? I noticed in all those reports Japan was at or near the bottom of countries measured for trust in their government. I was never able to find polling with regard to sentiment on Shinzo Abe's assassination but the majority of the country opposed the state funeral for him: https://en.wikipedia.org/wiki/Assassination_of_Shinzo_Abe#Re...
I think that had far more to do with it than saving a few yen.
Here's a Japanese article from when the decision was made. Note that the scandal leading to his assassination, which was a significant issue in its own right, isn't even mentioned. That's because the decision to hold a state funeral was itself very scandalous.