Both shoulders are grabbed from behind, but Uke hasn’t locked Tori down yet  – there is a chance to move.

Tori takes a big step forward and extends the same arm forward as the leg that just stepped. This should cause Uke to come around farther and even be on his toes or off-balance. Before Uke can regain his balance, Tori steps back to the original position he was before he stepped, however he must take care to return under Uke‘s arms.

Both of Uke‘s arms should be in front of Tori like the unbuckled back seat passengers of a speeding car end up in the front seat after a small head-on collision (but everyone is safe).

Now, you have at least two choices: take hold of Uke‘s arm that is just in front of your line of sight, or use your forehead to push his forearm is front of you. Eric J. and I found out that there is good leverage in the latter method. It also causes Uke to go even farther off balance. Thanks Eric!

Tori can then properly take hold of Uke‘s arm and continue with ikkyo, nikyo, sankyo or yonkyo etc.