Takashimaya department store chain is selling the tree —— actually a small tower of preserved roses with a teddy bear —— for a symbolic 200.7 million yen from Wednesday to kick off its year-end sales campaign.
The tree, which stands 40 centimeters (16 inches) high, features about 100 carats of diamonds from southern Africa and Australia, the department store said.
The smaller diamond pieces "sparkle charmingly like morning dew on petals, while two-carat and three-carat pieces mesmerise admirers with their noble glow," the store said in a statement.
The tree is based on a design by Parisian flower boutique Claude Quinquaud.
In recent years, many Asian people are embracing the western festival as a great excuse for shopping, partying and even romance, though few of them are Christians.
In Japan, Christmas Eve has taken on a meaning similar to Valentine's Day, being the time for romance among young couples.
