The Bad Sleep Well (1963) on Netflix

It is a high-profile wedding: the daughter of Mr Iwabuchi, a wealthy businessman, is marrying Mr Nishi, a car salesman. However, Mr Iwabuchi and other senior members of his company are suspected of corporate malfeasance and the wedding becomes a bit of a farce, with the press swarming all over it. To add to the discord, the company officials are rather publicly reminded of an ignominious event which occurred a few years ago - a senior employee committed suicide by jumping from the 7th floor of their offices. Now other senior officials are committing suicide and it looks like it is related to that death of a few years ago.