I happened to come across "The Vulture" on NHK On-Demand in 2018. In fact, I started watching it with some concern at first.
"The thumbnail image looks like a yakuza, and he's scary!"
"I'm not good at maths, but will I be able to understand the contents of this drama?"
But I didn't need to worry because the introduction was so catchy that I didn't have time to worry about it.
During a few years, "Hagetaka(2018)" was dramatised again on TV Asahi, and an extra episode, "Spiral(2019)", was also dramatised on TV Tokyo.
"The Vulture" was far more emotional than those dramas. Perhaps the adaptation tailored to the personality of the actors was most effective.
The economic activities in this drama were quite advanced in Japan at the time. In particular, the employee buy-out depicted in the final episode was implemented in Japan in 2020 for the first time. And I think it was probably the earliest depiction of the global financial crisis in a film "The Vulture(2009)".