Take tofu out of the package and wrap in a couple of layers of paper towels. Put wrapped tofu on your counter and place a weight on the tofu.  Your weight should be heavy enough to press down evenly across the top of the tofu, but not so heavy so as to cause the tofu block to crumble. Press for about  30 minutes.

Rinse the rice thoroughly until the water runs clear. Soak the rice in cold water for 30 minutes, if you have time.  Drain and add to a medium-sized pot and add water until rice is barely covered.  Turn on the stove to medium-high, bring to a boil and let boil for 30 seconds. Reduce heat to the lowest setting, put the lid on and let  boil for 10 minutes without lifting the lid. Take pot off the stove without removing the lid and let stand until it's time to serve. 

Peel the onion and slice thinly. Peel and chop garlic and grate the ginger. 

In a pot or a deep pan, heat 1 tbsp of butter over medium heat. Add onions and let fry for 3 minutes. Add garlic and ginger and fry for another minute. Make sure, your garlic does not brown. Add curry, star anise and turmeric and stir. Add a tbsp of butter and add 2 tbsp of flour, stirring well. Let flour fry with spices for about a minute, then slowly add 400 ml of broth, stirring all the time. Season with 1 tsp of sugar, 3/4 tsp of salt, vinegar and soy sauce. Let sauce come to a boil and let simmer on low heat for 7 to 10 minutes. Stir every once in a while.

Cut pressed tofu into cubes of 4 to 6 cm and season with salt and pepper and chilli powder. Put panko into a shallow bowl. Measure out 100 g of flour in a separate bowl. Break egg into a bowl and mix.  

Pour frying oil into a big pot and bring up to 170 to 175 Celsius (347 F). Bread the tofu by dredging it first in the flour mixture, then in the beaten egg (let excess drip off), and finally in the panko breadcrumbs. Pat the breadcrumbs on to help them adhere.

Let tofu nuggets slide into the hot oil. Make sure not to add more than 4 at a time. If the temperature of the oil drops after adding the tofu, adjust your burner heat to keep a constant frying temperature between 330-350 degrees. Fry the katsu tofu until golden brown, turning them once to allow for even browning. Carefully transfer the tofu to a plate lined with paper towels, and repeat the process for the remaining tofu. 

Fluff up the rice with your fork. Serve tofu katsu immediately with rice and curry sauce.