Ryu ga Gotoku Ishin (released in Japan in February 2014) is a spin-off game set at the end of the Edo period of Japanese history (known as the Bakumatsu period), a period when the Tokugawa Shogunate came to an end and imperial rule was restored (Meiji Restoration).
Sakamoto Ryoma is living undercover, with a false identity, as "Saito Hajime" in Kyoto. One year earlier, on the eve of the coup d'état of Tosa, Ryoma's foster father, the man who raised him, was murdered before his eyes. The only lead he had to discover who the killer was is that he used the Tennen Rishin style of fighting. This is a style used by the Shinsengumi, so Ryoma infiltrates their ranks, becoming captain of the 3rd Shinsengumi unit, in attempt to find the killer.
Big thanks to Kevin Debrabandere for creating a PDF for the entire Ishin guide. You can download the PDF version of the guide here. Please be advised that the PDF is outdated now, but still contains information for the whole game.
Head to the lottery location in Fushimi and talk to the woman there. If you have a lottery ticket, you can select the top option to play. Set the thing into motion with the right analogue stick. Press Circle to exit out of the lottery game.
You can find lottery tickets on the ground when walking around - they glow white - just go up to them and press Circle to pick them up. Some restaurants and shops also give you lottery tickets when you eat/buy at their restaurant/store.
Select the 2nd option to have a look at the prizes on offer.
If you save before you play the lottery, you can re-load the game and play lottery again if you don't get the prizes you want.
When you go to this area after the events in Chapter 2 with Saigo Kichinosuke, she gives you a free ticket and explains the lottery game.
After playing the lottery 50 times, a new lottery stand opens up next to her (Rare Item Lottery). Playing this one requires 5 lottery tickets per play, but you can get rarer items from this stand (and, thank the lord, you don't ever get tissues as a prize).
Apart from the fourth prize, you can only get each prize once. After getting all 5 prizes once, new items become available to win.
