Some frequently requested ones:

• If you don’t take risks, you can’t create a future!
  
  
• The moment you think of giving up, think of the reason why you held on so long
  
  
• Set your heart ablaze
  
  
• A place where someone still thinks about you is a place you can call home
  
  
• It is foolish to fear what we have yet to see and know
  
  
• A dropout will beat a genius through hard work
  
  
• Weakness disgusts me
  
  
• Those who do not understand true pain, can never understand true peace
  
  
• People's lives don't end when they die, they end when they lose faith
  
  
• Either people change or they die before they do
  
  
• The best discipline is pain
  
  
• Thinking you’re no-good and worthless is the worst thing you can do
  
  
• Don’t give up, there’s no shame in falling down! True shame is to not stand up again!
• Life's greatest lessons are learnt through pain
  
  

Japanese idioms also known as "Yojijukugo" are idioms strictly made out of 4 characters (kanjis) such as:

• 言行一致 - Practice what you preach
  
  
• 一心不乱 - Stay focused on one thing
  
  
• 新進気鋭 - Young, fresh, and energetic
  
  
• 誠心誠意 - Do things with sincerity
  
  
• 鼓舞激励 - Inspire, empower, and encourage
  
  
• 油断大敵 - Overconfidence is one's downfall
  
  
• 大器晩成 - Greatness takes time
  
  
• 一陽来復 - With hardship comes ease
  
  
• 臥薪嘗胆 - To go through thick and thin to attain an objective
  
  

Unlike Japanese idioms, Japanese proverbs also known as "Kotowaza" have no character limit so they come in all lengths.

Below are some examples:

• A Journey of a thousand miles begins with a single step
  
  
• No one has ever lost a thing by smiling
  
  
• "Water flows" - intended meaning: to forgive and forget
  
  
• "Even monkeys fall from trees" - intended meaning: Nobody's perfect
  
  
• "Continuity is power" - intended meaning: practice makes perfect
  
  
• Holding treasure (and not using it) makes it rot - intended meaning: unused great talent is a waste