In the age before Honda developed the now mainstream 4-stroke outboard engines, many people thought that it was virtually impossible from a technical standpoint to develop a 4-stroke outboard engine. Honda enthusiastically took on this challenge. The history of 4-stroke outboard engines can be told with the outboard engines developed by Honda. Since outboards are used in the great outdoors the thing that we are most proud of is our steadfast commitment to the concept of “foremost concern for the environment”. We have followed this principle since outboard development started in the 1960s, aiming to keep water clean and air fresh. Honda will continue to take on this challenge with useful innovative concepts and unique technology, guaranteeing nature will be preserved for future generations.