Having a word with the Assistant Chief Engineer of the Lexus ES

Overcoming seemingly overwhelming odds such as those faced by the Assistant Chief Engineer of the Lexus ES is a challenge anyone will recognise. Few, however, have offered such dedication, resilience and passion as Kazuhito Imaizumi (KI) has. Having to match up to the accomplishment of the Lexus GS and the Lexus IS is no easy feat, but the man behind Lexus' latest sedan seems to know the secret recipe to succeeding.

Kazuhito Imaizumi joined Toyota Motor Corporation in 1986 and was first assigned to be in charge of designing the chassis, mainly in charge of the suspension design of Starlet, Tercel, and Paseo in his career in the company before being assigned to be the Assistant Chief Engineer of the first generation Scion tC.

It was only in 2009 when he was transferred to Lexus headquarters where he was appointed as the Assistant Chief Engineer, in charge of planning and developing the ES model range.

SGCM: What is the main reason for adding a hybrid variant to the ES range?

KI: We did some research and looked into the various types of cars customers preferred. Some of them see fuel efficiency as the most important factor while others consider the drive as their top priority. Thus, we added a hybrid variant as an additional option for customers. Plus, Lexus strongly believes in hybrid models. As you would already know, from the LS model down to the CT, hybrid is available on all models.

SGCM: How would you address the critics when they say that the Lexus ES is a more luxurious form of the Toyota Camry?

KI: Although both cars look similar, there are many differences. In order to enhance the body rigidity of the ES, a lot of parts are different from the Camry. For Lexus, the riding comfort has to be more superior and has to be very quiet. And all these are achieved without compromising on high quality materials. Hence a lot of parts have been changed. On top of that, the wheelbase has been extended. Even the suspensions used, both front and rear, are different.
SGCM: What other challenges did you face when creating the new Lexus ES?

KI: We strongly believe in the concept of Omotenashi, or the Japanese spirit of hospitality, when it comes to Lexus. When users climb inside, they must be very satisfied. To achieve that, the ambient lights, for example, have been tweaked. Even the cupholders have to come out right, with the correct speed and consistency. Attention to detail is of utmost importance and is definitely a challenge.

SGCM: Why isn't the Lexus ES300h using Lithium-ion battery?

KI: We have had a good track record with the nickel-metal hydride battery in the Camry hybrid and it has proven to be very reliable. Hence, we decided not to change it to Lithium-ion.

SGCM: Considering that the Lexus GS competes against the 5 Series, E-Class and the A6, who, in your opinion, are the exact competitors of the Lexus ES?

KI: There were a couple of cars that we used as benchmarks. Depending on the countries, we used the Mercedes-Benz C-Class and the E-Class, the Audi A6 and the Acura TL.

SGCM: On a more personal note, what are some of your favourite cars?

KI: My favourite is the Alphard, which is also my personal car. My wife, on the other hand, drives a second generation Prius.

SGCM: But considering that you're an engineer for the Lexus ES, why isn't a one of your favourites an ES?

KI: Well, I love the ES, without a doubt. But unfortunately, it cannot be one of my favourites because I cannot buy it. The car is not sold in Japan.