Japan's real wages extend eight-month winning streak, supporting BOJ rate hike rationale

For the Bank of Japan, the most important detail is base salary. Base pay staying close to 4% suggests sustained wage increases rather than a temporary bonus surge, exactly the sort of data officials seek before additional tightening. This underpins the yen and short-term JGB yields somewhat, even though the overall real wage increase decelerated. The main threat to real wage gains is inflation. Given that the price index used in the calculation is just over 2%, and Tokyo's core inflation is rising due to higher oil prices from the Middle East turmoil, a further increase in the deflator could swiftly eat into real wage improvements. This conflict is reflected in the Reuters Tankan published earlier, in which service companies reported that inflation is eroding household buying power even as wages climb.

Japanese employees continue to outpace inflation, and the consistent growth in base salaries provides the BOJ with further justification for rate increases.

Key figures in summary:

• In August, Japan's inflation-adjusted real wages climbed 1.5% from a year earlier, marking the eighth straight month of gains, and decelerating from a revised 2% rise in July.
• Total cash earnings, or nominal wages, grew nearly 4% to around 311,000 yen, easing from a revised 4.3% increase in July.
• Regular pay also expanded close to 4%, matching July's rate, and overtime pay accelerated to about 5% from 4.5%.
• Bonus payments, which are volatile and one-off, were unchanged after increasing around 5% in July.
• The inflation gauge used to compute real wages remained just above 2%, down from roughly 3% a year earlier.

Government data released on Wednesday revealed that Japan's real wages increased for the eighth consecutive month in August, continuing a streak that strengthens the argument for additional BOJ rate hikes.

After adjusting for inflation, pay increased 1.5% year-on-year, a deceleration from the revised 2% gain in July. Nominal wages, or total cash earnings, rose nearly 4% to approximately 311,000 yen, down from a revised 4.3% rise a month earlier.

The deceleration in overall earnings was mainly due to bonuses. One-time special payments, which are volatile, posted no growth in August following a roughly 5% increase in July. Core pay was more stable: regular salaries rose nearly 4%, unchanged from July, and overtime pay growth picked up to about 5% from 4.5%, indicating companies are continuing to push staff working hours.

The price index employed by the labour ministry for real wage calculations remained just above 2% in August, flat from July and far below the approximately 3% level a year ago. This subdued deflator has been a major factor in keeping real wages in positive territory.

This data adds to signs that Japan is progressing toward the long-sought cycle of rising wages and prices. The BOJ increased its policy rate to 1.25% in September, and Tokyo core inflation quickened to its fastest in 10 months that same month, bolstering the case for more rate increases.

However, not all indicators are aligned. A Wednesday Reuters business survey revealed a sharp drop in sentiment among Japanese service firms, with retailers and food manufacturers reporting that inflation is hurting household spending power. BOJ board member Ayano Sato, who dissented from the September rate increase, stated this week that she prefers a gradual approach to rate hikes, without a predetermined schedule.

The sustainability of real wage increases hinges on price trends. With oil prices high due to the Middle East conflict, a more rapid inflation acceleration would reduce the gap between wage growth and living costs.