Reborn as a Business Tycoon

As the protagonist grew older and became disabled from a work injury, he was no longer useful to his company and was kicked out. With nowhere to turn, he chose to end his life by jumping into a river, only to unexpectedly travel back to his younger days when his wife and son were still alive. Overjoyed, the protagonist uses the experience he accumulated over decades to quickly build a fortune and become a business tycoon.