The CPBL and KBO are busy signing stateside players, the NPB typically follows those two.
KBO rosters are capped at 3 foreign players per team, CPBL and NPB rosters are capped at 4 foreign players per team (though each NPB's minor league affiliate can have additional foreign players on it).
Most players are pitchers, though there are exceptions (like stateside low BAVG power hitters like Dayan Viciedo).
Most players who go overseas sign year to year, though again there are exceptions. Those who do well usually sign multi-year extensions. A small handful re-sign stateside.
CPBL players usually make about .25 to .5M$ per season, KBO players are usually around .5 to 1M$ per (1M$ is the cap for first time foreign players in KBO), NPB contracts are typically larger than both of those coming in around 1 to 2M$ per and top out at around 4M$ per. In other words, they almost all make more than what every minor leaguer makes in the states - even if they are on a 40 man roster.
An interesting note is that Cuban National Series' players are beginning to eat up dedicated foreigner roster spots in the NPB.
NPB Signings:
Robert Suarez - 1 year, 6.75M + POPT (never played affiliated ball in USA)
Mel Rojas Jr. - 2 years, 5.0M + INC
Cory Spangenberg - 1 year, 1.4M + INC
Eric Thames - 1 year, 1.2M
Adeiny Hechavarria - 1 year, 1.0M
Drew VerHagen -
Cy Sneed -
Jose Osuna -
Reed Garrett
Fernando Romero - 1 year, 725K
Raul Alcantara -
KBO Signings:
Hanwha - pitcher - Ryan Carpenter - 1 year, 400K
Hanwha - pitcher - Nick Kingham - 1 year, 350K
Hanwha - hitter - Ryan Healy - 1 year, 800K + INC
Samsung - pitcher - David Buchanan - 1 year, 1.0M + INC
Samsung - pitcher - Ben Lively - 1 year,
Samsung - hitter - Jose Pirela - 1 year, 600K + INC
Lotte - pitcher - Dan Straily - 1 year, 1.2M + INC
Lotte - pitcher - Enderson Franco, 1 year, 300K + INC
Lotte - hitter - Dixon Machado - 1 year, 650K + TOPT
Kia - pitcher - Aaron Brooks - 1 year, 1.2M
Kia - pitcher - Daniel Mengden - 1 year, 725K + INC
Kia - hitter - Preston Tucker - 1 year, 1.05M
LG - pitcher - Casey Kelly - 1 year, 1.4M
LG - pitcher - Andrew Suarez - 1 year,
LG - hitter - Roberto Ramos - 1 year, 800K + INC
KT - pitcher - William Cuevas - 1 year, 750K + INC
KT - pitcher - Odrisamer Despaigne - 1 year, 800K + INC
KT - hitter - Zoilo Almonte - 1 year, 525K + INC
SK - pitcher - Wilmer Font - 1 year, 1.0M
SK - pitcher - Artie Lewicki - 1 year, 750K + INC
SK - hitter - Jamie Romak - 1 year, 1.15M + INC
NC - pitcher - Drew Rucinski - 1 year, 1.6M + INC
NC - pitcher - Wes Parsons - 1 year, 350K + INC
NC - hitter - Aaron Altherr - 1 year, 1.3M + INC
Doosan - pitcher - Walker Lockett - 1 year,
Doosan - pitcher - Ariel Miranda - 1 year, 700K + INC
Doosan - hitter - Jose Miguel Fernandez, 1 year, 800K + INC
Kiwoom - pitcher - Eric Jokisch - 1 year, 900K
Kiwoom - pitcher - Josh A. Smith - 1 year, 500K + INC
Kiwoom - hitter - David Freitas - 1 year, 550K + INC
CPBL Signings:
Hector Noesi - 1 year, 400K
Dillon Overton
Deck McGuire
Jake Brigham
Felix Doubront
Tim Melville
Jose de Paula
Ryan Bollinger
Bradin Hagens
Aaron Wilkerson
J.C. Ramirez
Gabriel Ynoa
Brock Dykxhoorn
Junichi Tazawa
Drew Gagnon
Onelki Garcia
Rosell Herrera
Bryan Woodall