Talk to Bianca, the girl in the right mansion in the third part of the town, after the second day to get the Axe.
Easy level up for items
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 and you can easily get high level items.
Fishing Rod
Turn right at the first part of the town, go down the stairs, then run to the end of the port and Sara will give you the Fishing Rod.
Hammer
After you have plowed the 50th soil, talk to Leo, the Blacksmith in the second store of the right in the first part of the town, to get the Hammer.
Japanese mode
Hold R and press A during the introduction sequence. The game's title will be spoken in Japanese to confirm correct code entry. All voice acting will now be in Japanese.
Scythe
Talk to Rosetta, the girl in the store with a sprout, after you have plowed enough soil in the farm to get the Scythe.
Sickle
Increase your hoe to level 2 to get a Sickle from Rosetta.
Unlock Carmite Cave
Till 100 squares on your farm.
Unlock Clemens Cave
Till 100 squares in the Toros Cave and defeat the Chimera.
Unlock Dannan Cave
Defeat the Golum in the Kasmir Ruins.
Unlock Greed Cave
Defeat the Battle Tank in the Dannan Cave.
Unlock Kasmir Ruins Till
100 squares in the Misty Bloom Cave and defeat the Siren.
Unlock Misty Bloom Cave
Till 100 squares in Mt. Gigant and defeat the Dragon.
Unlock Mt. Gigant
Rescue Cecilia in Clemens cave and defeat the Rafflesia(the Plant).
Unlock Toros Cave
Till 50 squares in the Carmite Cave and defeat the Greater Daemon.