The "aha" moment has come for me however with the two-CD album duets he has made with pianist and fellow Finn Heikki Sarmanto, Conversations (TUM 024-2). It's the two of them going over the music of Sarmato, a few collaborative, spontaneously improvised efforts composition-wise, and a couple of standards.
Juhani sticks to the tenor, Heikki to the piano and they weave some rather magical speals and spells. Sarmanto seems like the ideal partner in such a dialog. He is concerned with a spontaneously advanced tonal platform and has many moments of brilliance in a kind of post-Paul-Bley world. He too I have not paid sufficient attention to, and in this context he sounds great.
Juhani on tenor is a fully formed presence. There are intimations of Trane and Ben, Archie and the grand tradition of tenorism, but put in a context that is firmly modern and Aaltonian.
These are marvels of expressive freedom grounded in all that has come before, but re-found in a new playing situation, so to speak.
Very impressive! Very beautiful. Try and give this one a listen!