Mitsubishi UFJ Financial Group Inc., Japan’s largest bank, is planning to sell its first so-called green bonds that are compliant with total loss-absorbing capacity, or TLAC rules.

MUFG plans to issue $500 million in green notes as part of a larger debt offering that may total $3 billion, according to a person with knowledge of the matter. The deal may price Tuesday and the size of total offering and of green bonds may change depending on investor demand, according to the person, who asked not to be identified because the deal hasn’t been completed.

Taiki Kitaura, a spokesman for MUFG in Tokyo, confirmed the debt offering plan but said the size of the green bond issue and the overall offering aren’t set. If completed, the green bond sale would be MUFG’s first, he said. The Nikkei newspaper earlier reported details of the sale.

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