Irimi tenkan allows entering in the first opponent's yokomen attack and - at the same time- to step off the attack line of the opponent behind you.
The second part of the movement becomes shiho nage. It is the exact empty hand translation of the sword movement described in the article Aikiken Happo giri. The movement is happo giri.
This action allows throwing the first opponent and -at the same time- stepping off the new attack line offered to your second opponent on your left side.
Any Akido tecnique is designed to protect yourself in one single time from all attacks coming from different directions.
Aikido is not a sport, it is a martial art which laws (takemusu) are in harmony with the laws of the universe. Studying them allows the practitioner to understand his place in the universe. Aikido was born in Iwama, O sensei achieved in that village the synthesis of tai jutsu, aiki ken and aiki jo.
The International Takemusu Aikido Federation (ITAF) brings to the practitioner the structure he needs in order to work as close as possible to the reality O sensei MU defined. The official national representations are the guarantee of a teaching faithful to the Founder's.
In modern Aikido, weapons are hardly taught, if taught at all. In O sensei's Aikido, on the contrary, aiki ken, aiki jo and tai jutsu are unified and form together a riai, a family of harmonious techniques stemming from one unique principle. Each techniques helps understand all the others.
Peace is a balance between a human being and the world around him. The true martial art's goal is not to become stronger than one's opponent but to find in that opponent a way to realize harmony. There is no enemy anymore as such, but an opportunity offered to reach unified ki.