Japan considering second supplementary budget, according to Yomiuri

Japan has a long-established rhythm of supplementary budgets: extra budgets late in the fiscal year have been the norm rather than the exception, and a second one signals spending pressure exceeding what the first could absorb, typically tied to energy and living-cost relief or stimulus ahead of political windows. The transmission channel is JGB supply: supplementary budgets financed through additional issuance have historically steepened the long end and super-long sectors, with duration repricing on the size of the funding gap rather than the headline package. The distinction worth drawing is between deficit-financed spending and packages funded through surplus accounts or front-loading, since only the former adds net supply. Key follow-ons are the package size, the financing split, and whether the Bank of Japan's purchase operations adjust around the announcement, as BoJ buying has in past episodes absorbed a large share of incremental issuance. Yomiuri-sourced fiscal scoops have a reasonable track record of foreshadowing official announcements, so confirmation from the finance ministry or ruling party channels is the next tell.