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Can Japan rebuild its position in advanced semiconductors? The country has fallen behind in leading-edge logic production, but it remains highly competitive in materials, manufacturing equipment, and image sensors. TSMC’s Kumamoto investment also shows that Japan can attract fabrication projects when customers, talent, subsidies, and supply chains align. For Rapidus, producing a 2nm prototype is only an early milestone. Commercial success will depend on yield, quality, customer validation, talent, reliable power, and cost control. The article explains why earthquakes or domestic demand alone cannot determine the outcome—and why Japan, South Korea, and Taiwan cannot be reduced to one simple ranking. Read more : https://injoys.com/en/articles/japan-semiconductor-revival-rapidus-analysis #JapaneseSemiconductors #Rapidus #SemiconductorFoundry #TSMC #SemiconductorIndustry

Why might a 2x single-stock ETF lag even when the underlying stock recovers? The answer lies in daily resets and compounding. Gains and losses across volatile sessions can produce volatility decay, while daily rebalancing may require buying after rises and selling after declines. The article also separates policy criticism from formal delisting requirements—and notes where cited market figures lack enough information for independent verification. Read more : https://injoys.com/en/articles/single-stock-leveraged-etf-delisting-debate #LeveragedETF #SingleStockETF #VolatilityDecay #Rebalancing #Delisting

How could interest, dividends, or ETF gains affect your health insurance premiums? For employee subscribers, non-salary income above ₩20 million a year generally triggers an additional income-based premium on the excess. For local subscribers, once annual interest and dividend income exceeds ₩10 million, the entire amount may be reflected in the calculation. The article also explains dependent eligibility, ETF income classifications, ISA planning, and what to check when applying for voluntary continuation coverage. #HealthInsurance #FinancialIncome #ISA #RetirementPlanning #PersonalFinance

Why do vibe coding projects often stall just before launch? The issue may not be React, Next.js, Supabase, or prompting skill. Complexity can grow when architecture is unclear, implementation patterns vary, and external-service boundaries are poorly defined. This article explains how to choose between repairing and rebuilding—and what a conditional 4-hour recovery sprint can realistically achieve: a narrower scope, a reimplemented core flow, and a working baseline rather than a guaranteed production-ready service. Read more : https://injoys.com/en/articles/vibe-coding-project-architecture-and-four-hour-rescue-sprint #VibeCoding #AICoding #WebDevelopment #ProjectRecovery #RubyOnRails

Interest on refunded IPO subscription deposits is reportedly under consideration—but investors should treat current estimates as scenarios, not promised returns. The article explains how subscription deposits work, what could determine the interest calculation, and why details such as weekends, taxes and costs matter. It also examines a theoretical 1% annual-rate scenario and warns that IPO subscription loan costs may exceed any refund interest. Read more : https://injoys.com/en/articles/ipo-subscription-deposit-refund-interest-korea #IPO #IPOStocks #SubscriptionDeposit #RefundInterest #Investing

Why can medical care cost more on the day you return from abroad? Your National Health Insurance eligibility may still exist, but benefits can be suspended while you are overseas. After arrival, immigration records usually take about a day to appear in the insurance system, so the hospital may ask you to pay the full amount. If that happens, you can generally return to the hospital within 14 days to receive the difference between the full charge and the insured amount. For same-day treatment, you can also report your arrival through The Health Insurance app, the NHIS website, or 1577-1000. Read more : https://injoys.com/en/articles/korea-health-insurance-entry-day-medical-cost-refund #NationalHealthInsurance #ArrivalDayTreatment #HospitalBillReimbursement #EntryDeclaration