Eri Yoshida worked out with Samurai All Japan today. Despite the rain, Yoshida worked out for about 2 hours (pitching practice and facing live batters).
UPDATE 5/8 @ 1:42pm - Yoshida is now throwing the ball from a three-quarters arm slot (about 50 cm higher than before) instead of her previous side-arm slot. Said Yoshida, "I've pitched [professionally] for 2 years now and I needed to change something. I was walking a lot of batters throwing from the side. I've changed [my mechanics] to something where I can throw a lot of knuckleballs free and easy."
It seems the new arm slot has also added about 10km/h to her pitches (she's now throwing anywhere from the mid 110km/h range to close to 120km/h).
According to the Samurai All Japan GM blog, Akinori Otsuka will be helping out as a special temporary coach. Otsuka is eying a return to the Majors and will be working with Samurai All Japan as he works his way back into playing form.