https://jp.motorsport.com/f1/news/-3129710/3129710/
Yamamoto's quotes,mainly google translation,some modification.
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"One of the biggest reason to work with Red Bull was that we could go for win."
"As long as Honda does motorsports, we always want to win, so we explain to our management team that we can go to win by working with Red Bull,this it the first thing we do and they understand it. "
"If we want to win,i think that Red Bull was the best choice .When i had the meeting with Marko, i felt that Red Bull was very pure regarding the motorsports.How to win,i felt its the common sense between Red Bull and us. "
"When talking with them, we were also very satisfied, there are a lot of pressure, of course, but we thought that there was great significance in doing together, so we were able to reach an agreement."
"From the next season, we will be supplying power units to 4 cars of 2 teams, which means we can supply power units to all of the Red Bull Group's cars.This group has Red Bull and Toro Rosso, both teams have a very good relationship.I think that the race management will be dense if we join to them. "
"I think Mercedes and Ferrari are focusing on their Works team, I do not know how much support they will give to their customer teams.But since we see Red Bull and Toro Rosso in front of us, highly competitive, I think we can see the data. "
"We will continue to fill in details of contract with Red Bull. At this moment the announcement is just a MOU,a basic agreement that Honda signed with Red Bull and supply the powerunit in the next two seasons.In the coming months we will arrange the details. "
"I think we have to do a lot update to our power unit,and it is difficult.And both Red Bull and us must work very hard.It will be difficult for the WDC suddenly next year. Although the emotion are rising, the reality is its still difficult, but I think that I would like to make an effort there. "
"Our target is to ensure that Red Bull does not get worse than this year, and definitely overtake Renault."
"I think now that Mercedes and Ferrari's (power unit) are nearly equal, after that it is Renault and I think Honda is in a place near there,but its still fourth. I think few tens of kW is still needed to overtake Reanult. "
"As you all know, the chassis that Red Bull produces is the top class in the current F1 world, so it is a great pressure to decide to supply a power unit to them, but everyone in the company respects Red Bull, So I am looking forward to it. "
"We have already decided the menu of the update this year so we will shift to the development for the next season in the second half of the season.The engine can only be used up to three per year, so the timing to introduce is also limited. "
"I think the next upgrade will be a small change, its important for the development team to focus on next season and have a good preparation to work with Red Bull next year."
"Of course, as a hope of Honda I would like to run (Japanese driver), but first of all they must get the super license."