JAPAN鈥橲 ECONOMY will exceed growth forecasts this year, prompting the central bank to tighten monetary policy by mid-year, said Allen Sinai, president of Decision Economics Inc.

Sinai said he expects Japan鈥檚 economy to grow 2% in 2018, and even faster in 2019, perhaps as much as 2.5%. 鈥淲hat has snuck up on everybody is the world business cycle is really clicking,鈥 he said in an interview in Tokyo on Wednesday, where he was meeting with policy makers.

The market鈥檚 reaction on Tuesday to the Bank of Japan鈥檚 reduced buying of long-dated bonds illustrates growing jitters over when the BoJ will turn toward policy normalization. Economists cautioned against reading too much into the BoJ鈥檚 bond buying, but with Japan鈥檚 economy in its longest expansion since the mid-1990s, expectations are rising that the BoJ will join its global peers and begin normalizing policy as soon as this year.

鈥楿PSIDE SURPRISE鈥
鈥淭he markets and I are sensing, because of the fundamentals of the Japanese economy, an upside surprise potentially on growth and on inflation, and therefore a surprise out of the BoJ,鈥 Sinai said.

Inflation remains well below the BoJ鈥檚 2% target, but the central bank鈥檚 preferred gauge rose steadily throughout last year, hitting 0.9% in November. Sinai said he expects inflation to reach 2% before the BoJ鈥檚 projected time frame of 鈥渁round鈥 the fiscal year beginning in April 2019.

Sinai said his firm is forecasting that the BoJ will 鈥渂ecome less accommodative鈥 in the next three to six months, allowing interest rates to rise while setting an upper limit, he said.

BoJ Governor Haruhiko Kuroda said last month that the central bank won鈥檛 raise rates just because the economy is doing well because its ultimate target is inflation.

Sinai stands on the bullish side of prognosticators. Of 41 economists who expect the BoJ鈥檚 next move to be tightening, 19 forecast it to come this year, including five who see it happening in April, according to a Bloomberg survey last month.

A year ago, Sinai was roughly on target when he predicted Japan鈥檚 economy would grow 1.5% to 1.75% in 2017, about double the International Monetary Fund鈥檚 forecast at the time. He was wide of the mark on the yen, though, forecasting it would weaken to as much as 135 against the dollar by the end of the year.

鈥楰NOWN QUANTITY鈥
Sinai said it would 鈥渁bsolutely鈥 be good if Kuroda remained governor after his current term ends in April, given that he is a 鈥渒nown quantity鈥 who has proven capable of doing the job. Prime Minister Shinzo Abe would be taking a risk if he chose someone else, Sinai said.

Even with his bullish outlook, Sinai sees challenges ahead for Japanese policy makers. In particular, uprooting the deflationary mindset of Japanese consumers will remain a struggle, he said.

鈥淭he history of that says that once it鈥檚 there it takes a long, long time to change,鈥 he said. —聽Bloomberg