During the introduction sequence, hold R and press A. If you entered the code correctly, the game's title will be spoken in Japanese. All voice acting will now be in Japanese.
Talk to Bianca.
Walk to the end of the pier, and Sabrina will give you a fishing rod.
Plow 50 squares in Carmite Cave to get a hammer from Leo.
Increase your hoe to level 2 to get a Sickle from Rosetta.
Take the item you want to level, and go to the seashell on the beach. Trade it with a friend. It should have grown a level. Trade back and forth to easily get high level items.
To propose to a girl you must have the correct proposal item. For example, Sharon's is the Grimores Sword, and Lara's is the Lapris Lazuli. Talk to them to find out what they want.