It¡¯s a bittersweet weekend for one of Japan¡¯s auto giants: After four Formula One drivers¡¯ championships and two constructors¡¯ championships, the Honda-Red Bull partnership is nearing an end.

With Sunday marking the final Japanese Grand Prix of the tie-up, Honda Racing President Koji Watanabe reflected on one of the most successful constructor-engine supplier partnerships in the history of the sport.

¡°Looking back now, we¡¯re very proud of the results that we have achieved with this partnership,¡± Watanabe told The Japan Times in an interview on Saturday. ¡°Especially with Yuki (Tsunoda) being here at a home race, racing for Red Bull ... it¡¯s a very important and very significant weekend.¡±