“There seems to be a bull market in Tokyo real estate this year.” Note: Though this phrase usually refers to a stock market, it can refer to a strong market in any product.
Shoot the bull
To pass the time in casual conversation
“They finished their project at noon and have been shooting the bull in the coffee shop all afternoon.”
A bull in a china shop
A person who can act carelessly when he/she should act carefully
“Don’t let him handle the negotiations; he’s like a bull in a china shop.”
Take the bull by the horns
To act decisively to solve a problem
“Koito-san is the only one we can trust to take the bull by the horns and figure out this mess.”
Bull
A person who believes the stock market will rise
“The stock market fell today after a famous bull said in a TV interview that he was selling his stock to buy government bonds.”