The majority of his messages are very vague and brief, he is indeed a very enigmatic man. I'll type them up for all the volumes I have on hand (some are on loan to a friend).
I will type volume number, volume title according to Viz and Togashi's opening message:
Volume 1: Day of Departure
"Yoshihiro Togashi here. I'm back doing a weekly serial, and here I am publishing my first volume already. Thanks to all my readers for their support. I am entirely indebted to you. I took this picture (it is a photo of Togashi wearing a rabbit mask) at a certain party by the way, not a shady membership club. I'll work hard to crank out dozens of volumes. I promise not to complain. I won't run away. I won't lose it. I think. Maybe."
Volume 2: A Struggle in the Mist
"Go on without me. I'll catch up in two minutes" (picture of Togashi lying in the middle of a road)
Volume 3: Resolution
"A Vow on the Ocean - Or not." (picture of what appears to be a woman staring out to sea)
Volume 4: End Game
"I got married (details in volume 5)" (picture of Togashi wearing rabbit ears)
Volume 5: Family Matters
"The picture in volume 3 was me! (the one who took it was my then girlfriend, now wife)" (picture of Togashi with long hair...)
Volume 6: Nen Sense
"It's temporary, of course" (picture of Togashi with his arms crossed with a messy drawing of Gon on his table)
Volume 7: Next
"I'll never do it again!" (picture of Togashi grovelling on his knees whilst wearing a rabbit hat)
Volume 8: The Island
"Figure 1" (picture of some strange looking Egyptian box with little dolls sticking out)
Volume 9 (it is on loan to a friend)
Volume 10: Fakes, Swindles, and the Old Switcheroo
"We didn't see any." (picture of a sign saying to be careful when driving as it is a wildcat crossing)
Volume 11: Next Stop: Meteor City the Junkyard of the World
"Now we're a family of three." (picture of a dog plush, a rabbit plush and a small dog plush)
Volume 12: September 4: Part 2
"Sit back, relax and enjoy." (picture of Togashi in what appears to be a butler-ish pose)
Volume 13: September 10th
"Please help yourself." (picture of a sandwich with Togashi's dog face on it)
Volume 14: The Secret of Greed Island
"I'm the one in the center. In case that wasn't clear." (picture of Togashi standing in between a Chrollo cosplayer and a Kurapika cosplayer)
Volume 15: Progress
"I won 20,000 yen at the casino. Though I spent 15,000..." (picture of Togashi sitting on a throne)
Volume 16: Face-Off
"Giraffes." (picture of Giraffes...)
Volume 17: A Fierce Three-Way Struggle
"I'm the one on the right." (picture of two dolphins jumping in the air)
Volume 18: Chance Encounter
"I had to redraw a lot of this volume too..." (picture of Togashi's dog avatar looking exhausted)
Volume 19: N.G.L
"This volume was even more work..." (picture of Togashi's dog avatar looking even more exhausted than the last one)
Volume 20: Weakness
"..." (picture of Togashi's dog avatar now turned into a pile of goo)
Volume 21: Reunion
"I'm just barely getting by." (picture of an emoticon face made up of japanese characters)
Volume 22: 8: Part 1
"I hope you'll enjoy this in conjunction with the serialization in Weekly Shonen Jump" (picture of exhausted Togashi dog)
Rest of the volumes are on loan. If anyone could do the rest that'd be great.
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